Finding the Fourth Proportional to 22,140.68, 30,557.22 and 12,713

Step by Step Solution

1. Step 1: Write the proportion equation
   22,140.68 : 30,557.22 = 12,713 : x
2. Step 2: Convert to fraction form
   22,140.68/30,557.22 = 12,713/x
3. Step 3: Cross multiply
   22,140.68x = 30,557.22 × 12,713
4. Step 4: Simplify right side
   22,140.68x = 388,473,937.86
5. Step 5: Solve for x
   x = 388,473,937.86/22,140.68
6. Step 6: Final answer
   x = 17,545.71