Finding the Fourth Proportional to 88,940.30, 133,082.40 and 81,067.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,940.30 : 133,082.40 = 81,067.10 : x
2. Step 2: Convert to fraction form
   88,940.30/133,082.40 = 81,067.10/x
3. Step 3: Cross multiply
   88,940.30x = 133,082.40 × 81,067.10
4. Step 4: Simplify right side
   88,940.30x = 10,788,604,229.04
5. Step 5: Solve for x
   x = 10,788,604,229.04/88,940.30
6. Step 6: Final answer
   x = 121,301.64