Finding the Fourth Proportional to 16,871.76, 25,310.72 and 8,442.67

Step by Step Solution

1. Step 1: Write the proportion equation
   16,871.76 : 25,310.72 = 8,442.67 : x
2. Step 2: Convert to fraction form
   16,871.76/25,310.72 = 8,442.67/x
3. Step 3: Cross multiply
   16,871.76x = 25,310.72 × 8,442.67
4. Step 4: Simplify right side
   16,871.76x = 213,690,056.42
5. Step 5: Solve for x
   x = 213,690,056.42/16,871.76
6. Step 6: Final answer
   x = 12,665.55