Finding the Fourth Proportional to 22,757.06, 31,403.61 and 12,686.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,757.06 : 31,403.61 = 12,686.33 : x
2. Step 2: Convert to fraction form
   22,757.06/31,403.61 = 12,686.33/x
3. Step 3: Cross multiply
   22,757.06x = 31,403.61 × 12,686.33
4. Step 4: Simplify right side
   22,757.06x = 398,396,402.63
5. Step 5: Solve for x
   x = 398,396,402.63/22,757.06
6. Step 6: Final answer
   x = 17,506.50