Finding the Fourth Proportional to 2,216.52, 3,325.17 and 918.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.52 : 3,325.17 = 918.09 : x
2. Step 2: Convert to fraction form
   2,216.52/3,325.17 = 918.09/x
3. Step 3: Cross multiply
   2,216.52x = 3,325.17 × 918.09
4. Step 4: Simplify right side
   2,216.52x = 3,052,805.33
5. Step 5: Solve for x
   x = 3,052,805.33/2,216.52
6. Step 6: Final answer
   x = 1,377.30