Finding the Fourth Proportional to 22,818.71, 31,488.03 and 12,609.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,818.71 : 31,488.03 = 12,609.31 : x
2. Step 2: Convert to fraction form
   22,818.71/31,488.03 = 12,609.31/x
3. Step 3: Cross multiply
   22,818.71x = 31,488.03 × 12,609.31
4. Step 4: Simplify right side
   22,818.71x = 397,042,329.66
5. Step 5: Solve for x
   x = 397,042,329.66/22,818.71
6. Step 6: Final answer
   x = 17,399.86