Finding the Fourth Proportional to 17,855.53, 24,642.43 and 9,899.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,855.53 : 24,642.43 = 9,899.28 : x
2. Step 2: Convert to fraction form
   17,855.53/24,642.43 = 9,899.28/x
3. Step 3: Cross multiply
   17,855.53x = 24,642.43 × 9,899.28
4. Step 4: Simplify right side
   17,855.53x = 243,942,289.70
5. Step 5: Solve for x
   x = 243,942,289.70/17,855.53
6. Step 6: Final answer
   x = 13,662.00