Finding the Fourth Proportional to 1,268.76, 1,749.42 and 957.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,268.76 : 1,749.42 = 957.72 : x
2. Step 2: Convert to fraction form
   1,268.76/1,749.42 = 957.72/x
3. Step 3: Cross multiply
   1,268.76x = 1,749.42 × 957.72
4. Step 4: Simplify right side
   1,268.76x = 1,675,454.52
5. Step 5: Solve for x
   x = 1,675,454.52/1,268.76
6. Step 6: Final answer
   x = 1,320.54