Finding the Fourth Proportional to 2,205.57, 3,308.18 and 818.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.57 : 3,308.18 = 818.27 : x
2. Step 2: Convert to fraction form
   2,205.57/3,308.18 = 818.27/x
3. Step 3: Cross multiply
   2,205.57x = 3,308.18 × 818.27
4. Step 4: Simplify right side
   2,205.57x = 2,706,963.82
5. Step 5: Solve for x
   x = 2,706,963.82/2,205.57
6. Step 6: Final answer
   x = 1,227.33