Finding the Fourth Proportional to 42,010.50, 63,025.89 and 12,025.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,010.50 : 63,025.89 = 12,025.20 : x
2. Step 2: Convert to fraction form
   42,010.50/63,025.89 = 12,025.20/x
3. Step 3: Cross multiply
   42,010.50x = 63,025.89 × 12,025.20
4. Step 4: Simplify right side
   42,010.50x = 757,898,932.43
5. Step 5: Solve for x
   x = 757,898,932.43/42,010.50
6. Step 6: Final answer
   x = 18,040.70