Finding the Fourth Proportional to 1,279.60, 1,766.01 and 984.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.60 : 1,766.01 = 984.76 : x
2. Step 2: Convert to fraction form
   1,279.60/1,766.01 = 984.76/x
3. Step 3: Cross multiply
   1,279.60x = 1,766.01 × 984.76
4. Step 4: Simplify right side
   1,279.60x = 1,739,096.01
5. Step 5: Solve for x
   x = 1,739,096.01/1,279.60
6. Step 6: Final answer
   x = 1,359.09