Finding the Fourth Proportional to 3,870.36, 5,805.72 and 2,311.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.36 : 5,805.72 = 2,311.10 : x
2. Step 2: Convert to fraction form
   3,870.36/5,805.72 = 2,311.10/x
3. Step 3: Cross multiply
   3,870.36x = 5,805.72 × 2,311.10
4. Step 4: Simplify right side
   3,870.36x = 13,417,599.49
5. Step 5: Solve for x
   x = 13,417,599.49/3,870.36
6. Step 6: Final answer
   x = 3,466.76