Finding the Fourth Proportional to 3,585.52, 4,945.86 and 2,168.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,585.52 : 4,945.86 = 2,168.20 : x
2. Step 2: Convert to fraction form
   3,585.52/4,945.86 = 2,168.20/x
3. Step 3: Cross multiply
   3,585.52x = 4,945.86 × 2,168.20
4. Step 4: Simplify right side
   3,585.52x = 10,723,613.65
5. Step 5: Solve for x
   x = 10,723,613.65/3,585.52
6. Step 6: Final answer
   x = 2,990.81