Finding the Fourth Proportional to 17,680.75, 24,399.43 and 9,722.90

Step by Step Solution

1. Step 1: Write the proportion equation
   17,680.75 : 24,399.43 = 9,722.90 : x
2. Step 2: Convert to fraction form
   17,680.75/24,399.43 = 9,722.90/x
3. Step 3: Cross multiply
   17,680.75x = 24,399.43 × 9,722.90
4. Step 4: Simplify right side
   17,680.75x = 237,233,254.64
5. Step 5: Solve for x
   x = 237,233,254.64/17,680.75
6. Step 6: Final answer
   x = 13,417.60