If an object is 6.6 feet tall, and casts a shadow that is 19.8 feet long, this can be represented as

6.6 = 19.8

Then we factor in the object which is 14.7 tall = to an unknown value

So:6.6 / 14.7 = 19.8 / x

6.6 * 3 = 19.8

---

14.7 * 3 = x

That makes x = to 44.1