Finding the Fourth Proportional to 16,406.52, 24,626.16 and 8,631.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,406.52 : 24,626.16 = 8,631.72 : x
2. Step 2: Convert to fraction form
   16,406.52/24,626.16 = 8,631.72/x
3. Step 3: Cross multiply
   16,406.52x = 24,626.16 × 8,631.72
4. Step 4: Simplify right side
   16,406.52x = 212,566,117.80
5. Step 5: Solve for x
   x = 212,566,117.80/16,406.52
6. Step 6: Final answer
   x = 12,956.20