Finding the Fourth Proportional to 3,860.71, 5,790.15 and 2,216.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,860.71 : 5,790.15 = 2,216.41 : x
2. Step 2: Convert to fraction form
   3,860.71/5,790.15 = 2,216.41/x
3. Step 3: Cross multiply
   3,860.71x = 5,790.15 × 2,216.41
4. Step 4: Simplify right side
   3,860.71x = 12,833,331.89
5. Step 5: Solve for x
   x = 12,833,331.89/3,860.71
6. Step 6: Final answer
   x = 3,324.09