Finding the Fourth Proportional to 42,007.22, 63,022.30 and 12,425.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.22 : 63,022.30 = 12,425.02 : x
2. Step 2: Convert to fraction form
   42,007.22/63,022.30 = 12,425.02/x
3. Step 3: Cross multiply
   42,007.22x = 63,022.30 × 12,425.02
4. Step 4: Simplify right side
   42,007.22x = 783,053,337.95
5. Step 5: Solve for x
   x = 783,053,337.95/42,007.22
6. Step 6: Final answer
   x = 18,640.92