Finding the Fourth Proportional to 89,854.02, 123,099.84 and 86,489.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,854.02 : 123,099.84 = 86,489.28 : x
2. Step 2: Convert to fraction form
   89,854.02/123,099.84 = 86,489.28/x
3. Step 3: Cross multiply
   89,854.02x = 123,099.84 × 86,489.28
4. Step 4: Simplify right side
   89,854.02x = 10,646,816,529.72
5. Step 5: Solve for x
   x = 10,646,816,529.72/89,854.02
6. Step 6: Final answer
   x = 118,490.15