Finding the Fourth Proportional to 88,099.52, 121,409.42 and 86,479.92

Step by Step Solution

1. Step 1: Write the proportion equation
   88,099.52 : 121,409.42 = 86,479.92 : x
2. Step 2: Convert to fraction form
   88,099.52/121,409.42 = 86,479.92/x
3. Step 3: Cross multiply
   88,099.52x = 121,409.42 × 86,479.92
4. Step 4: Simplify right side
   88,099.52x = 10,499,476,928.85
5. Step 5: Solve for x
   x = 10,499,476,928.85/88,099.52
6. Step 6: Final answer
   x = 119,177.46