Finding the Fourth Proportional to 3,871.12, 5,810.78 and 2,411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.12 : 5,810.78 = 2,411.30 : x
2. Step 2: Convert to fraction form
   3,871.12/5,810.78 = 2,411.30/x
3. Step 3: Cross multiply
   3,871.12x = 5,810.78 × 2,411.30
4. Step 4: Simplify right side
   3,871.12x = 14,011,533.81
5. Step 5: Solve for x
   x = 14,011,533.81/3,871.12
6. Step 6: Final answer
   x = 3,619.50