Finding the Fourth Proportional to 22,702.50, 31,329.45 and 12,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,702.50 : 31,329.45 = 12,766.50 : x
2. Step 2: Convert to fraction form
   22,702.50/31,329.45 = 12,766.50/x
3. Step 3: Cross multiply
   22,702.50x = 31,329.45 × 12,766.50
4. Step 4: Simplify right side
   22,702.50x = 399,967,423.43
5. Step 5: Solve for x
   x = 399,967,423.43/22,702.50
6. Step 6: Final answer
   x = 17,617.77