Finding the Fourth Proportional to 99,061.11, 136,668.45 and 65,087.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,061.11 : 136,668.45 = 65,087.88 : x
2. Step 2: Convert to fraction form
   99,061.11/136,668.45 = 65,087.88/x
3. Step 3: Cross multiply
   99,061.11x = 136,668.45 × 65,087.88
4. Step 4: Simplify right side
   99,061.11x = 8,895,459,673.39
5. Step 5: Solve for x
   x = 8,895,459,673.39/99,061.11
6. Step 6: Final answer
   x = 89,797.70