Finding the Fourth Proportional to 22,689.33, 31,306.69 and 13,256.07

Step by Step Solution

1. Step 1: Write the proportion equation
   22,689.33 : 31,306.69 = 13,256.07 : x
2. Step 2: Convert to fraction form
   22,689.33/31,306.69 = 13,256.07/x
3. Step 3: Cross multiply
   22,689.33x = 31,306.69 × 13,256.07
4. Step 4: Simplify right side
   22,689.33x = 415,003,607.83
5. Step 5: Solve for x
   x = 415,003,607.83/22,689.33
6. Step 6: Final answer
   x = 18,290.69