Finding the Fourth Proportional to 2,279.15, 3,145.28 and 1,335.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.15 : 3,145.28 = 1,335.54 : x
2. Step 2: Convert to fraction form
   2,279.15/3,145.28 = 1,335.54/x
3. Step 3: Cross multiply
   2,279.15x = 3,145.28 × 1,335.54
4. Step 4: Simplify right side
   2,279.15x = 4,200,640.57
5. Step 5: Solve for x
   x = 4,200,640.57/2,279.15
6. Step 6: Final answer
   x = 1,843.08