Finding the Fourth Proportional to 22,510.98, 31,063.53 and 12,439.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,510.98 : 31,063.53 = 12,439.30 : x
2. Step 2: Convert to fraction form
   22,510.98/31,063.53 = 12,439.30/x
3. Step 3: Cross multiply
   22,510.98x = 31,063.53 × 12,439.30
4. Step 4: Simplify right side
   22,510.98x = 386,408,568.73
5. Step 5: Solve for x
   x = 386,408,568.73/22,510.98
6. Step 6: Final answer
   x = 17,165.34