Finding the Fourth Proportional to 102,047.17, 140,826.78 and 56,108.75

Step by Step Solution

1. Step 1: Write the proportion equation
   102,047.17 : 140,826.78 = 56,108.75 : x
2. Step 2: Convert to fraction form
   102,047.17/140,826.78 = 56,108.75/x
3. Step 3: Cross multiply
   102,047.17x = 140,826.78 × 56,108.75
4. Step 4: Simplify right side
   102,047.17x = 7,901,614,592.33
5. Step 5: Solve for x
   x = 7,901,614,592.33/102,047.17
6. Step 6: Final answer
   x = 77,431.00