Finding the Fourth Proportional to 2,566.59, 3,851.04 and 1,086.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,566.59 : 3,851.04 = 1,086.21 : x
2. Step 2: Convert to fraction form
   2,566.59/3,851.04 = 1,086.21/x
3. Step 3: Cross multiply
   2,566.59x = 3,851.04 × 1,086.21
4. Step 4: Simplify right side
   2,566.59x = 4,183,042.23
5. Step 5: Solve for x
   x = 4,183,042.23/2,566.59
6. Step 6: Final answer
   x = 1,629.81