Finding the Fourth Proportional to 22,729.59, 31,366.80 and 12,658.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,729.59 : 31,366.80 = 12,658.91 : x
2. Step 2: Convert to fraction form
   22,729.59/31,366.80 = 12,658.91/x
3. Step 3: Cross multiply
   22,729.59x = 31,366.80 × 12,658.91
4. Step 4: Simplify right side
   22,729.59x = 397,069,341.35
5. Step 5: Solve for x
   x = 397,069,341.35/22,729.59
6. Step 6: Final answer
   x = 17,469.27