Finding the Fourth Proportional to 102,216.52, 141,057.72 and 56,893.78

Step by Step Solution

1. Step 1: Write the proportion equation
   102,216.52 : 141,057.72 = 56,893.78 : x
2. Step 2: Convert to fraction form
   102,216.52/141,057.72 = 56,893.78/x
3. Step 3: Cross multiply
   102,216.52x = 141,057.72 × 56,893.78
4. Step 4: Simplify right side
   102,216.52x = 8,025,306,888.98
5. Step 5: Solve for x
   x = 8,025,306,888.98/102,216.52
6. Step 6: Final answer
   x = 78,512.82