Finding the Fourth Proportional to 88,933.30, 133,071.90 and 81,060.10

Step by Step Solution

1. Step 1: Write the proportion equation
   88,933.30 : 133,071.90 = 81,060.10 : x
2. Step 2: Convert to fraction form
   88,933.30/133,071.90 = 81,060.10/x
3. Step 3: Cross multiply
   88,933.30x = 133,071.90 × 81,060.10
4. Step 4: Simplify right side
   88,933.30x = 10,786,821,521.19
5. Step 5: Solve for x
   x = 10,786,821,521.19/88,933.30
6. Step 6: Final answer
   x = 121,291.14