Finding the Fourth Proportional to 17,189.96, 23,717.61 and 9,920.24

Step by Step Solution

1. Step 1: Write the proportion equation
   17,189.96 : 23,717.61 = 9,920.24 : x
2. Step 2: Convert to fraction form
   17,189.96/23,717.61 = 9,920.24/x
3. Step 3: Cross multiply
   17,189.96x = 23,717.61 × 9,920.24
4. Step 4: Simplify right side
   17,189.96x = 235,284,353.78
5. Step 5: Solve for x
   x = 235,284,353.78/17,189.96
6. Step 6: Final answer
   x = 13,687.32