Finding the Fourth Proportional to 42,025.86, 63,042.42 and 13,939.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,025.86 : 63,042.42 = 13,939.92 : x
2. Step 2: Convert to fraction form
   42,025.86/63,042.42 = 13,939.92/x
3. Step 3: Cross multiply
   42,025.86x = 63,042.42 × 13,939.92
4. Step 4: Simplify right side
   42,025.86x = 878,806,291.41
5. Step 5: Solve for x
   x = 878,806,291.41/42,025.86
6. Step 6: Final answer
   x = 20,911.08