Finding the Fourth Proportional to 2,279.57, 3,414.78 and 1,045.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.57 : 3,414.78 = 1,045.28 : x
2. Step 2: Convert to fraction form
   2,279.57/3,414.78 = 1,045.28/x
3. Step 3: Cross multiply
   2,279.57x = 3,414.78 × 1,045.28
4. Step 4: Simplify right side
   2,279.57x = 3,569,409.78
5. Step 5: Solve for x
   x = 3,569,409.78/2,279.57
6. Step 6: Final answer
   x = 1,565.83