Finding the Fourth Proportional to 3,613.12, 5,411.78 and 2,149.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,613.12 : 5,411.78 = 2,149.04 : x
2. Step 2: Convert to fraction form
   3,613.12/5,411.78 = 2,149.04/x
3. Step 3: Cross multiply
   3,613.12x = 5,411.78 × 2,149.04
4. Step 4: Simplify right side
   3,613.12x = 11,630,131.69
5. Step 5: Solve for x
   x = 11,630,131.69/3,613.12
6. Step 6: Final answer
   x = 3,218.86