Finding the Fourth Proportional to 22,689.27, 31,306.60 and 13,256.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,689.27 : 31,306.60 = 13,256.01 : x
2. Step 2: Convert to fraction form
   22,689.27/31,306.60 = 13,256.01/x
3. Step 3: Cross multiply
   22,689.27x = 31,306.60 × 13,256.01
4. Step 4: Simplify right side
   22,689.27x = 415,000,379.85
5. Step 5: Solve for x
   x = 415,000,379.85/22,689.27
6. Step 6: Final answer
   x = 18,290.60