Finding the Fourth Proportional to 22,561.82, 31,132.70 and 12,488.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,561.82 : 31,132.70 = 12,488.88 : x
2. Step 2: Convert to fraction form
   22,561.82/31,132.70 = 12,488.88/x
3. Step 3: Cross multiply
   22,561.82x = 31,132.70 × 12,488.88
4. Step 4: Simplify right side
   22,561.82x = 388,812,554.38
5. Step 5: Solve for x
   x = 388,812,554.38/22,561.82
6. Step 6: Final answer
   x = 17,233.21