Finding the Fourth Proportional to 2,080.81, 2,871.56 and 1,149.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.81 : 2,871.56 = 1,149.31 : x
2. Step 2: Convert to fraction form
   2,080.81/2,871.56 = 1,149.31/x
3. Step 3: Cross multiply
   2,080.81x = 2,871.56 × 1,149.31
4. Step 4: Simplify right side
   2,080.81x = 3,300,312.62
5. Step 5: Solve for x
   x = 3,300,312.62/2,080.81
6. Step 6: Final answer
   x = 1,586.07