Finding the Fourth Proportional to 22,560.39, 31,132.86 and 12,488.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,560.39 : 31,132.86 = 12,488.25 : x
2. Step 2: Convert to fraction form
   22,560.39/31,132.86 = 12,488.25/x
3. Step 3: Cross multiply
   22,560.39x = 31,132.86 × 12,488.25
4. Step 4: Simplify right side
   22,560.39x = 388,794,938.90
5. Step 5: Solve for x
   x = 388,794,938.90/22,560.39
6. Step 6: Final answer
   x = 17,233.52