Finding the Fourth Proportional to 17,680.48, 24,399.18 and 9,722.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,680.48 : 24,399.18 = 9,722.78 : x
2. Step 2: Convert to fraction form
   17,680.48/24,399.18 = 9,722.78/x
3. Step 3: Cross multiply
   17,680.48x = 24,399.18 × 9,722.78
4. Step 4: Simplify right side
   17,680.48x = 237,227,859.32
5. Step 5: Solve for x
   x = 237,227,859.32/17,680.48
6. Step 6: Final answer
   x = 13,417.50