Finding the Fourth Proportional to 1,296.71, 1,789.67 and 773.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,296.71 : 1,789.67 = 773.05 : x
2. Step 2: Convert to fraction form
   1,296.71/1,789.67 = 773.05/x
3. Step 3: Cross multiply
   1,296.71x = 1,789.67 × 773.05
4. Step 4: Simplify right side
   1,296.71x = 1,383,491.58
5. Step 5: Solve for x
   x = 1,383,491.58/1,296.71
6. Step 6: Final answer
   x = 1,066.92