Finding the Fourth Proportional to 22,145.59, 30,562.28 and 12,715.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,145.59 : 30,562.28 = 12,715.57 : x
2. Step 2: Convert to fraction form
   22,145.59/30,562.28 = 12,715.57/x
3. Step 3: Cross multiply
   22,145.59x = 30,562.28 × 12,715.57
4. Step 4: Simplify right side
   22,145.59x = 388,616,810.70
5. Step 5: Solve for x
   x = 388,616,810.70/22,145.59
6. Step 6: Final answer
   x = 17,548.27