Finding the Fourth Proportional to 88,923.30, 133,056.90 and 81,050.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,923.30 : 133,056.90 = 81,050.10 : x
2. Step 2: Convert to fraction form
   88,923.30/133,056.90 = 81,050.10/x
3. Step 3: Cross multiply
   88,923.30x = 133,056.90 × 81,050.10
4. Step 4: Simplify right side
   88,923.30x = 10,784,275,050.69
5. Step 5: Solve for x
   x = 10,784,275,050.69/88,923.30
6. Step 6: Final answer
   x = 121,276.15