Finding the Fourth Proportional to 22,517.12, 31,078.62 and 13,091.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,517.12 : 31,078.62 = 13,091.12 : x
2. Step 2: Convert to fraction form
   22,517.12/31,078.62 = 13,091.12/x
3. Step 3: Cross multiply
   22,517.12x = 31,078.62 × 13,091.12
4. Step 4: Simplify right side
   22,517.12x = 406,853,943.85
5. Step 5: Solve for x
   x = 406,853,943.85/22,517.12
6. Step 6: Final answer
   x = 18,068.65