Finding the Fourth Proportional to 113,632.24, 157,095.92 and 85,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   113,632.24 : 157,095.92 = 85,288.72 : x
2. Step 2: Convert to fraction form
   113,632.24/157,095.92 = 85,288.72/x
3. Step 3: Cross multiply
   113,632.24x = 157,095.92 × 85,288.72
4. Step 4: Simplify right side
   113,632.24x = 13,398,509,934.02
5. Step 5: Solve for x
   x = 13,398,509,934.02/113,632.24
6. Step 6: Final answer
   x = 117,911.17