Finding the Fourth Proportional to 16,818.72, 23,209.92 and 9,366.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.72 : 23,209.92 = 9,366.72 : x
2. Step 2: Convert to fraction form
   16,818.72/23,209.92 = 9,366.72/x
3. Step 3: Cross multiply
   16,818.72x = 23,209.92 × 9,366.72
4. Step 4: Simplify right side
   16,818.72x = 217,400,821.86
5. Step 5: Solve for x
   x = 217,400,821.86/16,818.72
6. Step 6: Final answer
   x = 12,926.12