Finding the Fourth Proportional to 22,868.38, 31,555.47 and 13,311.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,868.38 : 31,555.47 = 13,311.34 : x
2. Step 2: Convert to fraction form
   22,868.38/31,555.47 = 13,311.34/x
3. Step 3: Cross multiply
   22,868.38x = 31,555.47 × 13,311.34
4. Step 4: Simplify right side
   22,868.38x = 420,045,561.06
5. Step 5: Solve for x
   x = 420,045,561.06/22,868.38
6. Step 6: Final answer
   x = 18,367.97