Finding the Fourth Proportional to 2,871.15, 3,960.49 and 1,808.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.15 : 3,960.49 = 1,808.49 : x
2. Step 2: Convert to fraction form
   2,871.15/3,960.49 = 1,808.49/x
3. Step 3: Cross multiply
   2,871.15x = 3,960.49 × 1,808.49
4. Step 4: Simplify right side
   2,871.15x = 7,162,506.56
5. Step 5: Solve for x
   x = 7,162,506.56/2,871.15
6. Step 6: Final answer
   x = 2,494.65