Finding the Fourth Proportional to 22,510.76, 31,064.73 and 12,439.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.76 : 31,064.73 = 12,439.90 : x
2. Step 2: Convert to fraction form
   22,510.76/31,064.73 = 12,439.90/x
3. Step 3: Cross multiply
   22,510.76x = 31,064.73 × 12,439.90
4. Step 4: Simplify right side
   22,510.76x = 386,442,134.73
5. Step 5: Solve for x
   x = 386,442,134.73/22,510.76
6. Step 6: Final answer
   x = 17,167.00