This function will get the height of the img and resize the right column accordingly. 

 

jQuery(document).ready(function( $ ){

    $(window).on('ready load resize', function(){

    var img = $('.complete-install-img').height();

      $('#complete-install-right').css('height', img+'px');

    });

});

This will only execute when columns are not stacked.

jQuery(document).ready(function( $ ){

    $(window).on('ready load resize', function(){

      if(($(window).width() > 763) || ($(window).resize() > 763)){

       var img = $('.complete-install-img').height();

        //console.log(img);

       $('#complete-install-right').css('height', img+'px');

      

       // all other pages

        var img2 = $('.two-column-img .x-img').height();

       $('.two-column-text').css('height', img2+'px');

      }

    });

});