Finding the Fourth Proportional to 13,727.42, 20,613.90 and 8,566.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,727.42 : 20,613.90 = 8,566.10 : x
2. Step 2: Convert to fraction form
   13,727.42/20,613.90 = 8,566.10/x
3. Step 3: Cross multiply
   13,727.42x = 20,613.90 × 8,566.10
4. Step 4: Simplify right side
   13,727.42x = 176,580,582.89
5. Step 5: Solve for x
   x = 176,580,582.89/13,727.42
6. Step 6: Final answer
   x = 12,863.35