Finding the Fourth Proportional to 17,677.88, 24,395 and 9,720.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,677.88 : 24,395 = 9,720.18 : x
2. Step 2: Convert to fraction form
   17,677.88/24,395 = 9,720.18/x
3. Step 3: Cross multiply
   17,677.88x = 24,395 × 9,720.18
4. Step 4: Simplify right side
   17,677.88x = 237,123,791.10
5. Step 5: Solve for x
   x = 237,123,791.10/17,677.88
6. Step 6: Final answer
   x = 13,413.59