Finding the Fourth Proportional to 1,296.88, 1,789.71 and 707.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,296.88 : 1,789.71 = 707.42 : x
2. Step 2: Convert to fraction form
   1,296.88/1,789.71 = 707.42/x
3. Step 3: Cross multiply
   1,296.88x = 1,789.71 × 707.42
4. Step 4: Simplify right side
   1,296.88x = 1,266,076.65
5. Step 5: Solve for x
   x = 1,266,076.65/1,296.88
6. Step 6: Final answer
   x = 976.25