Finding the Fourth Proportional to 3,870.66, 5,800.31 and 2,405.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.66 : 5,800.31 = 2,405.37 : x
2. Step 2: Convert to fraction form
   3,870.66/5,800.31 = 2,405.37/x
3. Step 3: Cross multiply
   3,870.66x = 5,800.31 × 2,405.37
4. Step 4: Simplify right side
   3,870.66x = 13,951,891.66
5. Step 5: Solve for x
   x = 13,951,891.66/3,870.66
6. Step 6: Final answer
   x = 3,604.53