Find four numbers forming a geometric progression in which the third term is greater than the first term by 9, and the second term is greater than the `4^(t h)`by 18.

Explanation

To solve the problem of finding four numbers forming a geometric progression (GP) with the given conditions, we can follow these steps:

### Step 1: Define the terms of the geometric progression
Let the four terms of the geometric progression be:
- First term: \( a \)
- Second term: \( ar \)
- Third term: \( ar^2 \)
- Fourth term: \( ar^3 \)
...