Finding the Fourth Proportional to 102,042.56, 140,887.41 and 91,253.90

Step by Step Solution

1. Step 1: Write the proportion equation
   102,042.56 : 140,887.41 = 91,253.90 : x
2. Step 2: Convert to fraction form
   102,042.56/140,887.41 = 91,253.90/x
3. Step 3: Cross multiply
   102,042.56x = 140,887.41 × 91,253.90
4. Step 4: Simplify right side
   102,042.56x = 12,856,525,623.40
5. Step 5: Solve for x
   x = 12,856,525,623.40/102,042.56
6. Step 6: Final answer
   x = 125,991.80