Finding the Fourth Proportional to 16,811.55, 25,216.61 and 5,718.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,811.55 : 25,216.61 = 5,718.15 : x
2. Step 2: Convert to fraction form
   16,811.55/25,216.61 = 5,718.15/x
3. Step 3: Cross multiply
   16,811.55x = 25,216.61 × 5,718.15
4. Step 4: Simplify right side
   16,811.55x = 144,192,329.88
5. Step 5: Solve for x
   x = 144,192,329.88/16,811.55
6. Step 6: Final answer
   x = 8,576.98