Finding the Fourth Proportional to 1,258.15, 1,736.27 and 760.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.15 : 1,736.27 = 760.70 : x
2. Step 2: Convert to fraction form
   1,258.15/1,736.27 = 760.70/x
3. Step 3: Cross multiply
   1,258.15x = 1,736.27 × 760.70
4. Step 4: Simplify right side
   1,258.15x = 1,320,780.59
5. Step 5: Solve for x
   x = 1,320,780.59/1,258.15
6. Step 6: Final answer
   x = 1,049.78