Finding the Fourth Proportional to 2,227.16, 3,338.16 and 839.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.16 : 3,338.16 = 839.61 : x
2. Step 2: Convert to fraction form
   2,227.16/3,338.16 = 839.61/x
3. Step 3: Cross multiply
   2,227.16x = 3,338.16 × 839.61
4. Step 4: Simplify right side
   2,227.16x = 2,802,752.52
5. Step 5: Solve for x
   x = 2,802,752.52/2,227.16
6. Step 6: Final answer
   x = 1,258.44