This tute may be a little closer to what you''re looking for. Anyway, you may be able to modify it to add the third ruffle.
Also, I have a pattern for a ruffle shirt that gives you the basic idea of how to do the three ruffles. You''d just have to change up the top to make it a skirt rather than a shirt. It''d definitely be helpful for the ruffle part though.
Hope this helps!