Finding the Fourth Proportional to 17,857.72, 24,642.69 and 9,899.47

Step by Step Solution

1. Step 1: Write the proportion equation
   17,857.72 : 24,642.69 = 9,899.47 : x
2. Step 2: Convert to fraction form
   17,857.72/24,642.69 = 9,899.47/x
3. Step 3: Cross multiply
   17,857.72x = 24,642.69 × 9,899.47
4. Step 4: Simplify right side
   17,857.72x = 243,949,570.37
5. Step 5: Solve for x
   x = 243,949,570.37/17,857.72
6. Step 6: Final answer
   x = 13,660.73