Finding the Fourth Proportional to 3,871.37, 5,811.15 and 2,411.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.37 : 5,811.15 = 2,411.55 : x
2. Step 2: Convert to fraction form
   3,871.37/5,811.15 = 2,411.55/x
3. Step 3: Cross multiply
   3,871.37x = 5,811.15 × 2,411.55
4. Step 4: Simplify right side
   3,871.37x = 14,013,878.78
5. Step 5: Solve for x
   x = 14,013,878.78/3,871.37
6. Step 6: Final answer
   x = 3,619.88