Finding the Fourth Proportional to 102,139.43, 140,913.72 and 63,359.33

Step by Step Solution

1. Step 1: Write the proportion equation
   102,139.43 : 140,913.72 = 63,359.33 : x
2. Step 2: Convert to fraction form
   102,139.43/140,913.72 = 63,359.33/x
3. Step 3: Cross multiply
   102,139.43x = 140,913.72 × 63,359.33
4. Step 4: Simplify right side
   102,139.43x = 8,928,198,182.44
5. Step 5: Solve for x
   x = 8,928,198,182.44/102,139.43
6. Step 6: Final answer
   x = 87,411.87