Finding the Fourth Proportional to 88,926.30, 133,061.40 and 81,053.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,926.30 : 133,061.40 = 81,053.10 : x
2. Step 2: Convert to fraction form
   88,926.30/133,061.40 = 81,053.10/x
3. Step 3: Cross multiply
   88,926.30x = 133,061.40 × 81,053.10
4. Step 4: Simplify right side
   88,926.30x = 10,785,038,960.34
5. Step 5: Solve for x
   x = 10,785,038,960.34/88,926.30
6. Step 6: Final answer
   x = 121,280.64