Finding the Fourth Proportional to 1,296.17, 1,786.69 and 964.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,296.17 : 1,786.69 = 964.07 : x
2. Step 2: Convert to fraction form
   1,296.17/1,786.69 = 964.07/x
3. Step 3: Cross multiply
   1,296.17x = 1,786.69 × 964.07
4. Step 4: Simplify right side
   1,296.17x = 1,722,494.23
5. Step 5: Solve for x
   x = 1,722,494.23/1,296.17
6. Step 6: Final answer
   x = 1,328.91