Finding the Fourth Proportional to 17,879.67, 24,673.71 and 9,921.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,879.67 : 24,673.71 = 9,921.72 : x
2. Step 2: Convert to fraction form
   17,879.67/24,673.71 = 9,921.72/x
3. Step 3: Cross multiply
   17,879.67x = 24,673.71 × 9,921.72
4. Step 4: Simplify right side
   17,879.67x = 244,805,771.71
5. Step 5: Solve for x
   x = 244,805,771.71/17,879.67
6. Step 6: Final answer
   x = 13,691.85