Finding the Fourth Proportional to 2,581.80, 3,871.89 and 1,486.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.80 : 3,871.89 = 1,486.68 : x
2. Step 2: Convert to fraction form
   2,581.80/3,871.89 = 1,486.68/x
3. Step 3: Cross multiply
   2,581.80x = 3,871.89 × 1,486.68
4. Step 4: Simplify right side
   2,581.80x = 5,756,261.43
5. Step 5: Solve for x
   x = 5,756,261.43/2,581.80
6. Step 6: Final answer
   x = 2,229.55