Finding the Fourth Proportional to 42,006.48, 63,022.05 and 12,425.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,006.48 : 63,022.05 = 12,425.10 : x
2. Step 2: Convert to fraction form
   42,006.48/63,022.05 = 12,425.10/x
3. Step 3: Cross multiply
   42,006.48x = 63,022.05 × 12,425.10
4. Step 4: Simplify right side
   42,006.48x = 783,055,273.46
5. Step 5: Solve for x
   x = 783,055,273.46/42,006.48
6. Step 6: Final answer
   x = 18,641.30