Finding the Fourth Proportional to 85,602.52, 128,454.56 and 38,854.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,602.52 : 128,454.56 = 38,854.72 : x
2. Step 2: Convert to fraction form
   85,602.52/128,454.56 = 38,854.72/x
3. Step 3: Cross multiply
   85,602.52x = 128,454.56 × 38,854.72
4. Step 4: Simplify right side
   85,602.52x = 4,991,065,961.52
5. Step 5: Solve for x
   x = 4,991,065,961.52/85,602.52
6. Step 6: Final answer
   x = 58,305.13