Finding the Fourth Proportional to 22,757.82, 31,405.68 and 12,686.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,757.82 : 31,405.68 = 12,686.16 : x
2. Step 2: Convert to fraction form
   22,757.82/31,405.68 = 12,686.16/x
3. Step 3: Cross multiply
   22,757.82x = 31,405.68 × 12,686.16
4. Step 4: Simplify right side
   22,757.82x = 398,417,481.39
5. Step 5: Solve for x
   x = 398,417,481.39/22,757.82
6. Step 6: Final answer
   x = 17,506.84