Finding the Fourth Proportional to 2,581.07, 3,871.53 and 849.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.07 : 3,871.53 = 849.69 : x
2. Step 2: Convert to fraction form
   2,581.07/3,871.53 = 849.69/x
3. Step 3: Cross multiply
   2,581.07x = 3,871.53 × 849.69
4. Step 4: Simplify right side
   2,581.07x = 3,289,600.33
5. Step 5: Solve for x
   x = 3,289,600.33/2,581.07
6. Step 6: Final answer
   x = 1,274.51