Finding the Fourth Proportional to 3,870.56, 5,800.24 and 2,311.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.56 : 5,800.24 = 2,311.20 : x
2. Step 2: Convert to fraction form
   3,870.56/5,800.24 = 2,311.20/x
3. Step 3: Cross multiply
   3,870.56x = 5,800.24 × 2,311.20
4. Step 4: Simplify right side
   3,870.56x = 13,405,514.69
5. Step 5: Solve for x
   x = 13,405,514.69/3,870.56
6. Step 6: Final answer
   x = 3,463.46