Finding the Fourth Proportional to 22,139.40, 30,552.24 and 12,711

Step by Step Solution

1. Step 1: Write the proportion equation
   22,139.40 : 30,552.24 = 12,711 : x
2. Step 2: Convert to fraction form
   22,139.40/30,552.24 = 12,711/x
3. Step 3: Cross multiply
   22,139.40x = 30,552.24 × 12,711
4. Step 4: Simplify right side
   22,139.40x = 388,349,522.64
5. Step 5: Solve for x
   x = 388,349,522.64/22,139.40
6. Step 6: Final answer
   x = 17,541.10