<div class="container">
  <div class="item float">1</div>
  <div class="item float">2</div>
  <div class="item float">3</div>
  <div class="item">4</div>
</div>
.container {
  border: 4px solid;
}

.container .item:nth-child(4) {
  width: 150px;
  height: 150px;
  background-color: orange;
}

.container .item {
  width: 100px;
  height: 100px;
  background-color: royalblue;
  border-radius: 10px;
  font-size: 40px;
  margin: 10px;
}

.float {
  float: left;
}

External CSS

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External JavaScript

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