Finding the Fourth Proportional to 85,109.52, 117,443.88 and 47,387.28

Step by Step Solution

1. Step 1: Write the proportion equation
   85,109.52 : 117,443.88 = 47,387.28 : x
2. Step 2: Convert to fraction form
   85,109.52/117,443.88 = 47,387.28/x
3. Step 3: Cross multiply
   85,109.52x = 117,443.88 × 47,387.28
4. Step 4: Simplify right side
   85,109.52x = 5,565,346,025.85
5. Step 5: Solve for x
   x = 5,565,346,025.85/85,109.52
6. Step 6: Final answer
   x = 65,390.41