CSS - target last instance of div

Question

I have a div structure as below and i want to only target the last .pcontain on the page so i can remove the border-right - how do i go about it?

<div class="container">
    <div class="postcontainer">
        <div class="latest-posts">
            <div class="thumbnail"></div>
            <div class="pcontain"></div>
            <div class="more"></div>
        </div>
    </div>
    <div class="postcontainer">
        <div class="latest-posts">
            <div class="thumbnail"></div>
            <div class="pcontain"></div>
            <div class="more"></div>
        </div>
    </div>
    <div class="postcontainer">
        <div class="latest-posts">
            <div class="thumbnail"></div>
            <div class="pcontain"></div>
            <div class="more"></div>
        </div>
    </div>
    <div class="postcontainer">
        <div class="latest-posts">
            <div class="thumbnail"></div>
            <div class="pcontain"></div>
            <div class="more"></div>
        </div>
    </div>
</div>

Answer 1

Working Fiddle

Use last child

.postcontainer:last-child .pcontain{ 
    background: black;
    color: white;
}

Read more about last-child here