Finding the Fourth Proportional to 102,047.28, 140,826.93 and 56,108.86

Step by Step Solution

1. Step 1: Write the proportion equation
   102,047.28 : 140,826.93 = 56,108.86 : x
2. Step 2: Convert to fraction form
   102,047.28/140,826.93 = 56,108.86/x
3. Step 3: Cross multiply
   102,047.28x = 140,826.93 × 56,108.86
4. Step 4: Simplify right side
   102,047.28x = 7,901,638,499.60
5. Step 5: Solve for x
   x = 7,901,638,499.60/102,047.28
6. Step 6: Final answer
   x = 77,431.15