Finding the Fourth Proportional to 2,306.32, 3,182.78 and 1,258.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,306.32 : 3,182.78 = 1,258.40 : x
2. Step 2: Convert to fraction form
   2,306.32/3,182.78 = 1,258.40/x
3. Step 3: Cross multiply
   2,306.32x = 3,182.78 × 1,258.40
4. Step 4: Simplify right side
   2,306.32x = 4,005,210.35
5. Step 5: Solve for x
   x = 4,005,210.35/2,306.32
6. Step 6: Final answer
   x = 1,736.62