Finding the Fourth Proportional to 17,685, 24,404.22 and 9,728.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685 : 24,404.22 = 9,728.10 : x
2. Step 2: Convert to fraction form
   17,685/24,404.22 = 9,728.10/x
3. Step 3: Cross multiply
   17,685x = 24,404.22 × 9,728.10
4. Step 4: Simplify right side
   17,685x = 237,406,692.58
5. Step 5: Solve for x
   x = 237,406,692.58/17,685
6. Step 6: Final answer
   x = 13,424.18