Finding the Fourth Proportional to 85,500.18, 128,276.24 and 60,588.43

Step by Step Solution

1. Step 1: Write the proportion equation
   85,500.18 : 128,276.24 = 60,588.43 : x
2. Step 2: Convert to fraction form
   85,500.18/128,276.24 = 60,588.43/x
3. Step 3: Cross multiply
   85,500.18x = 128,276.24 × 60,588.43
4. Step 4: Simplify right side
   85,500.18x = 7,772,055,364.27
5. Step 5: Solve for x
   x = 7,772,055,364.27/85,500.18
6. Step 6: Final answer
   x = 90,901.04