Finding the Fourth Proportional to 102,061.80, 140,914.02 and 91,273.20

Step by Step Solution

1. Step 1: Write the proportion equation
   102,061.80 : 140,914.02 = 91,273.20 : x
2. Step 2: Convert to fraction form
   102,061.80/140,914.02 = 91,273.20/x
3. Step 3: Cross multiply
   102,061.80x = 140,914.02 × 91,273.20
4. Step 4: Simplify right side
   102,061.80x = 12,861,673,530.26
5. Step 5: Solve for x
   x = 12,861,673,530.26/102,061.80
6. Step 6: Final answer
   x = 126,018.49