Finding the Fourth Proportional to 2,216.55, 3,325.38 and 677.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.55 : 3,325.38 = 677.55 : x
2. Step 2: Convert to fraction form
   2,216.55/3,325.38 = 677.55/x
3. Step 3: Cross multiply
   2,216.55x = 3,325.38 × 677.55
4. Step 4: Simplify right side
   2,216.55x = 2,253,111.22
5. Step 5: Solve for x
   x = 2,253,111.22/2,216.55
6. Step 6: Final answer
   x = 1,016.49