Finding the Fourth Proportional to 88,079.39, 121,381.76 and 86,459.96

Step by Step Solution

1. Step 1: Write the proportion equation
   88,079.39 : 121,381.76 = 86,459.96 : x
2. Step 2: Convert to fraction form
   88,079.39/121,381.76 = 86,459.96/x
3. Step 3: Cross multiply
   88,079.39x = 121,381.76 × 86,459.96
4. Step 4: Simplify right side
   88,079.39x = 10,494,661,507.42
5. Step 5: Solve for x
   x = 10,494,661,507.42/88,079.39
6. Step 6: Final answer
   x = 119,150.02