Finding the Fourth Proportional to 11,919.46, 16,451.88 and 8,144.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,919.46 : 16,451.88 = 8,144.15 : x
2. Step 2: Convert to fraction form
   11,919.46/16,451.88 = 8,144.15/x
3. Step 3: Cross multiply
   11,919.46x = 16,451.88 × 8,144.15
4. Step 4: Simplify right side
   11,919.46x = 133,986,578.50
5. Step 5: Solve for x
   x = 133,986,578.50/11,919.46
6. Step 6: Final answer
   x = 11,240.99