Finding the Fourth Proportional to 22,561.56, 31,133.94 and 12,489.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,561.56 : 31,133.94 = 12,489.29 : x
2. Step 2: Convert to fraction form
   22,561.56/31,133.94 = 12,489.29/x
3. Step 3: Cross multiply
   22,561.56x = 31,133.94 × 12,489.29
4. Step 4: Simplify right side
   22,561.56x = 388,840,649.83
5. Step 5: Solve for x
   x = 388,840,649.83/22,561.56
6. Step 6: Final answer
   x = 17,234.65