Finding the Fourth Proportional to 2,566.04, 3,849.57 and 811.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,566.04 : 3,849.57 = 811.31 : x
2. Step 2: Convert to fraction form
   2,566.04/3,849.57 = 811.31/x
3. Step 3: Cross multiply
   2,566.04x = 3,849.57 × 811.31
4. Step 4: Simplify right side
   2,566.04x = 3,123,190.58
5. Step 5: Solve for x
   x = 3,123,190.58/2,566.04
6. Step 6: Final answer
   x = 1,217.12