Finding the Fourth Proportional to 89,151.84, 132,930.72 and 86,702.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,151.84 : 132,930.72 = 86,702.40 : x
2. Step 2: Convert to fraction form
   89,151.84/132,930.72 = 86,702.40/x
3. Step 3: Cross multiply
   89,151.84x = 132,930.72 × 86,702.40
4. Step 4: Simplify right side
   89,151.84x = 11,525,412,457.73
5. Step 5: Solve for x
   x = 11,525,412,457.73/89,151.84
6. Step 6: Final answer
   x = 129,278.46