Finding the Fourth Proportional to 1,279.27, 1,765.27 and 719.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.27 : 1,765.27 = 719.61 : x
2. Step 2: Convert to fraction form
   1,279.27/1,765.27 = 719.61/x
3. Step 3: Cross multiply
   1,279.27x = 1,765.27 × 719.61
4. Step 4: Simplify right side
   1,279.27x = 1,270,305.94
5. Step 5: Solve for x
   x = 1,270,305.94/1,279.27
6. Step 6: Final answer
   x = 992.99