Finding the Fourth Proportional to 22,515.17, 31,069.89 and 12,443.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.17 : 31,069.89 = 12,443.38 : x
2. Step 2: Convert to fraction form
   22,515.17/31,069.89 = 12,443.38/x
3. Step 3: Cross multiply
   22,515.17x = 31,069.89 × 12,443.38
4. Step 4: Simplify right side
   22,515.17x = 386,614,370.15
5. Step 5: Solve for x
   x = 386,614,370.15/22,515.17
6. Step 6: Final answer
   x = 17,171.29