Finding the Fourth Proportional to 22,757.18, 31,405.98 and 12,685.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,757.18 : 31,405.98 = 12,685.69 : x
2. Step 2: Convert to fraction form
   22,757.18/31,405.98 = 12,685.69/x
3. Step 3: Cross multiply
   22,757.18x = 31,405.98 × 12,685.69
4. Step 4: Simplify right side
   22,757.18x = 398,406,453.57
5. Step 5: Solve for x
   x = 398,406,453.57/22,757.18
6. Step 6: Final answer
   x = 17,506.85