Finding the Fourth Proportional to 22,686.39, 31,302.61 and 13,253.13

Step by Step Solution

1. Step 1: Write the proportion equation
   22,686.39 : 31,302.61 = 13,253.13 : x
2. Step 2: Convert to fraction form
   22,686.39/31,302.61 = 13,253.13/x
3. Step 3: Cross multiply
   22,686.39x = 31,302.61 × 13,253.13
4. Step 4: Simplify right side
   22,686.39x = 414,857,526.54
5. Step 5: Solve for x
   x = 414,857,526.54/22,686.39
6. Step 6: Final answer
   x = 18,286.63