Finding the Fourth Proportional to 85,498.52, 128,291.52 and 38,745.32

Step by Step Solution

1. Step 1: Write the proportion equation
   85,498.52 : 128,291.52 = 38,745.32 : x
2. Step 2: Convert to fraction form
   85,498.52/128,291.52 = 38,745.32/x
3. Step 3: Cross multiply
   85,498.52x = 128,291.52 × 38,745.32
4. Step 4: Simplify right side
   85,498.52x = 4,970,695,995.69
5. Step 5: Solve for x
   x = 4,970,695,995.69/85,498.52
6. Step 6: Final answer
   x = 58,137.80