Finding the Fourth Proportional to 22,496, 31,046.40 and 12,561.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,496 : 31,046.40 = 12,561.92 : x
2. Step 2: Convert to fraction form
   22,496/31,046.40 = 12,561.92/x
3. Step 3: Cross multiply
   22,496x = 31,046.40 × 12,561.92
4. Step 4: Simplify right side
   22,496x = 390,002,393.09
5. Step 5: Solve for x
   x = 390,002,393.09/22,496
6. Step 6: Final answer
   x = 17,336.52