How to update selected item state in the list box by clicking a button?

Question

I created a listbox menu to browse through content by clicking items in the listbox. I also created ‘back’ and ‘forward’ type of navigation to browse through the same content based on the browsing history. I load content into frame and accessing the browsing history with NavigationCommands.BrowseBack and BrowseForward Properties. It is working great. However, I need to indicate a selected state of the listbox item related to the content shown in the frame while browsing with Back/Forward buttons. I have a hard time binding that property. What is the correct way to bind selected state of the listitem in this case? Thank you in advance.

XAML: Button

<Button x:Name="NavBack" Content="" HorizontalAlignment="Left" Margin="20,0,0,0" 
                    Style="{DynamicResource BackButtonStyle}" VerticalAlignment="Top"
                    CommandTarget="{Binding ElementName=ContentFrame}"  
                    Command="{x:Static NavigationCommands.BrowseBack}" 
                    SnapsToDevicePixels="True" 
                    IsEnabled="{Binding CanGoBack, ElementName=ContentFrame, Mode=OneWay}" 

                    >

XAML: Listbox

<ListBox x:Name="Nav_ListBox" Margin="0,18,0,0" ScrollViewer.HorizontalScrollBarVisibility="Hidden" 
                Background="#FFF2F2F2"
                ItemsSource="{Binding Source={StaticResource PagesData}, XPath=page}" 
                Padding="0" IsTabStop="True" 
                BorderBrush="Black" 
                FontFamily="Segoe UI Light" 
                Foreground="Black" 
                BorderThickness="0" 
                Width="215" 
                SelectedIndex="0" 
                Grid.Column="0" HorizontalAlignment="Left" 
                ItemContainerStyle="{DynamicResource ListBoxItemContainerStyle}" 
                 >