Finding the Fourth Proportional to 3,866.66, 5,785.40 and 2,223.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.66 : 5,785.40 = 2,223.98 : x
2. Step 2: Convert to fraction form
   3,866.66/5,785.40 = 2,223.98/x
3. Step 3: Cross multiply
   3,866.66x = 5,785.40 × 2,223.98
4. Step 4: Simplify right side
   3,866.66x = 12,866,613.89
5. Step 5: Solve for x
   x = 12,866,613.89/3,866.66
6. Step 6: Final answer
   x = 3,327.58