Finding the Fourth Proportional to 3,866.85, 5,786.60 and 2,406.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.85 : 5,786.60 = 2,406.69 : x
2. Step 2: Convert to fraction form
   3,866.85/5,786.60 = 2,406.69/x
3. Step 3: Cross multiply
   3,866.85x = 5,786.60 × 2,406.69
4. Step 4: Simplify right side
   3,866.85x = 13,926,540.32
5. Step 5: Solve for x
   x = 13,926,540.32/3,866.85
6. Step 6: Final answer
   x = 3,601.52