Finding the Fourth Proportional to 16,719.98, 25,098.15 and 12,571.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,719.98 : 25,098.15 = 12,571.88 : x
2. Step 2: Convert to fraction form
   16,719.98/25,098.15 = 12,571.88/x
3. Step 3: Cross multiply
   16,719.98x = 25,098.15 × 12,571.88
4. Step 4: Simplify right side
   16,719.98x = 315,530,930.02
5. Step 5: Solve for x
   x = 315,530,930.02/16,719.98
6. Step 6: Final answer
   x = 18,871.49