Finding the Fourth Proportional to 17,856.72, 24,642.40 and 9,899.52

Step by Step Solution

1. Step 1: Write the proportion equation
   17,856.72 : 24,642.40 = 9,899.52 : x
2. Step 2: Convert to fraction form
   17,856.72/24,642.40 = 9,899.52/x
3. Step 3: Cross multiply
   17,856.72x = 24,642.40 × 9,899.52
4. Step 4: Simplify right side
   17,856.72x = 243,947,931.65
5. Step 5: Solve for x
   x = 243,947,931.65/17,856.72
6. Step 6: Final answer
   x = 13,661.41