Finding the Fourth Proportional to 8,613.86, 12,942.42 and 5,495.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,613.86 : 12,942.42 = 5,495.30 : x
2. Step 2: Convert to fraction form
   8,613.86/12,942.42 = 5,495.30/x
3. Step 3: Cross multiply
   8,613.86x = 12,942.42 × 5,495.30
4. Step 4: Simplify right side
   8,613.86x = 71,122,480.63
5. Step 5: Solve for x
   x = 71,122,480.63/8,613.86
6. Step 6: Final answer
   x = 8,256.75