Finding the Fourth Proportional to 22,562, 31,134.78 and 12,490.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,562 : 31,134.78 = 12,490.88 : x
2. Step 2: Convert to fraction form
   22,562/31,134.78 = 12,490.88/x
3. Step 3: Cross multiply
   22,562x = 31,134.78 × 12,490.88
4. Step 4: Simplify right side
   22,562x = 388,900,800.81
5. Step 5: Solve for x
   x = 388,900,800.81/22,562
6. Step 6: Final answer
   x = 17,236.98