Slideshow Items per Slide Horizontal

Hello,
I created a Block View and added a Slideshow . I add 3 images per slide and I want to display them horizontal .
How can I do this?

I tried using css code :

.views-slideshow-cycle-main-frame-row-item {
  float:left;
  width: auto !important;
}

But its still vertically.


Source: https://www.drupal.org/project/issues/rss/documentation