Finding the Fourth Proportional to 22,146.38, 30,562.61 and 12,715.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,146.38 : 30,562.61 = 12,715.55 : x
2. Step 2: Convert to fraction form
   22,146.38/30,562.61 = 12,715.55/x
3. Step 3: Cross multiply
   22,146.38x = 30,562.61 × 12,715.55
4. Step 4: Simplify right side
   22,146.38x = 388,620,395.59
5. Step 5: Solve for x
   x = 388,620,395.59/22,146.38
6. Step 6: Final answer
   x = 17,547.81