Finding the Fourth Proportional to 85,589.59, 128,414.78 and 38,200.37

Step by Step Solution

1. Step 1: Write the proportion equation
   85,589.59 : 128,414.78 = 38,200.37 : x
2. Step 2: Convert to fraction form
   85,589.59/128,414.78 = 38,200.37/x
3. Step 3: Cross multiply
   85,589.59x = 128,414.78 × 38,200.37
4. Step 4: Simplify right side
   85,589.59x = 4,905,491,918.47
5. Step 5: Solve for x
   x = 4,905,491,918.47/85,589.59
6. Step 6: Final answer
   x = 57,314.12