Finding the Fourth Proportional to 88,934.30, 133,073.40 and 81,061.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,934.30 : 133,073.40 = 81,061.10 : x
2. Step 2: Convert to fraction form
   88,934.30/133,073.40 = 81,061.10/x
3. Step 3: Cross multiply
   88,934.30x = 133,073.40 × 81,061.10
4. Step 4: Simplify right side
   88,934.30x = 10,787,076,184.74
5. Step 5: Solve for x
   x = 10,787,076,184.74/88,934.30
6. Step 6: Final answer
   x = 121,292.64