Finding the Fourth Proportional to 1,276.62, 1,761.82 and 709.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.62 : 1,761.82 = 709.52 : x
2. Step 2: Convert to fraction form
   1,276.62/1,761.82 = 709.52/x
3. Step 3: Cross multiply
   1,276.62x = 1,761.82 × 709.52
4. Step 4: Simplify right side
   1,276.62x = 1,250,046.57
5. Step 5: Solve for x
   x = 1,250,046.57/1,276.62
6. Step 6: Final answer
   x = 979.18