Finding the Fourth Proportional to 42,006.86, 63,022.59 and 12,425.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,006.86 : 63,022.59 = 12,425.48 : x
2. Step 2: Convert to fraction form
   42,006.86/63,022.59 = 12,425.48/x
3. Step 3: Cross multiply
   42,006.86x = 63,022.59 × 12,425.48
4. Step 4: Simplify right side
   42,006.86x = 783,085,931.59
5. Step 5: Solve for x
   x = 783,085,931.59/42,006.86
6. Step 6: Final answer
   x = 18,641.86