Finding the Fourth Proportional to 16,578.41, 24,858.72 and 8,661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,578.41 : 24,858.72 = 8,661.76 : x
2. Step 2: Convert to fraction form
   16,578.41/24,858.72 = 8,661.76/x
3. Step 3: Cross multiply
   16,578.41x = 24,858.72 × 8,661.76
4. Step 4: Simplify right side
   16,578.41x = 215,320,204.40
5. Step 5: Solve for x
   x = 215,320,204.40/16,578.41
6. Step 6: Final answer
   x = 12,987.99