Finding the Fourth Proportional to 3,858.18, 5,788.62 and 2,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858.18 : 5,788.62 = 2,216.10 : x
2. Step 2: Convert to fraction form
   3,858.18/5,788.62 = 2,216.10/x
3. Step 3: Cross multiply
   3,858.18x = 5,788.62 × 2,216.10
4. Step 4: Simplify right side
   3,858.18x = 12,828,160.78
5. Step 5: Solve for x
   x = 12,828,160.78/3,858.18
6. Step 6: Final answer
   x = 3,324.93