Finding the Fourth Proportional to 1,279.11, 1,766.05 and 979.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.11 : 1,766.05 = 979.83 : x
2. Step 2: Convert to fraction form
   1,279.11/1,766.05 = 979.83/x
3. Step 3: Cross multiply
   1,279.11x = 1,766.05 × 979.83
4. Step 4: Simplify right side
   1,279.11x = 1,730,426.32
5. Step 5: Solve for x
   x = 1,730,426.32/1,279.11
6. Step 6: Final answer
   x = 1,352.83