Finding the Fourth Proportional to 2,806.27, 3,871.87 and 1,811.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,806.27 : 3,871.87 = 1,811.59 : x
2. Step 2: Convert to fraction form
   2,806.27/3,871.87 = 1,811.59/x
3. Step 3: Cross multiply
   2,806.27x = 3,871.87 × 1,811.59
4. Step 4: Simplify right side
   2,806.27x = 7,014,240.97
5. Step 5: Solve for x
   x = 7,014,240.97/2,806.27
6. Step 6: Final answer
   x = 2,499.49