Finding the Fourth Proportional to 31,059.72, 42,862.50 and 18,484.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.72 : 42,862.50 = 18,484.20 : x
2. Step 2: Convert to fraction form
   31,059.72/42,862.50 = 18,484.20/x
3. Step 3: Cross multiply
   31,059.72x = 42,862.50 × 18,484.20
4. Step 4: Simplify right side
   31,059.72x = 792,279,022.50
5. Step 5: Solve for x
   x = 792,279,022.50/31,059.72
6. Step 6: Final answer
   x = 25,508.25