Finding the Fourth Proportional to 2,815.89, 4,223.83 and 1,255.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.89 : 4,223.83 = 1,255.49 : x
2. Step 2: Convert to fraction form
   2,815.89/4,223.83 = 1,255.49/x
3. Step 3: Cross multiply
   2,815.89x = 4,223.83 × 1,255.49
4. Step 4: Simplify right side
   2,815.89x = 5,302,976.33
5. Step 5: Solve for x
   x = 5,302,976.33/2,815.89
6. Step 6: Final answer
   x = 1,883.23