Finding the Fourth Proportional to 17,789.73, 26,554.33 and 15,687.91

Step by Step Solution

1. Step 1: Write the proportion equation
   17,789.73 : 26,554.33 = 15,687.91 : x
2. Step 2: Convert to fraction form
   17,789.73/26,554.33 = 15,687.91/x
3. Step 3: Cross multiply
   17,789.73x = 26,554.33 × 15,687.91
4. Step 4: Simplify right side
   17,789.73x = 416,581,939.15
5. Step 5: Solve for x
   x = 416,581,939.15/17,789.73
6. Step 6: Final answer
   x = 23,416.99