Finding the Fourth Proportional to 17,856.88, 24,642.64 and 9,899.24

Step by Step Solution

1. Step 1: Write the proportion equation
   17,856.88 : 24,642.64 = 9,899.24 : x
2. Step 2: Convert to fraction form
   17,856.88/24,642.64 = 9,899.24/x
3. Step 3: Cross multiply
   17,856.88x = 24,642.64 × 9,899.24
4. Step 4: Simplify right side
   17,856.88x = 243,943,407.59
5. Step 5: Solve for x
   x = 243,943,407.59/17,856.88
6. Step 6: Final answer
   x = 13,661.03