Finding the Fourth Proportional to 99,066.88, 148,470.72 and 85,864.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,066.88 : 148,470.72 = 85,864.96 : x
2. Step 2: Convert to fraction form
   99,066.88/148,470.72 = 85,864.96/x
3. Step 3: Cross multiply
   99,066.88x = 148,470.72 × 85,864.96
4. Step 4: Simplify right side
   99,066.88x = 12,748,432,433.97
5. Step 5: Solve for x
   x = 12,748,432,433.97/99,066.88
6. Step 6: Final answer
   x = 128,685.11