Finding the Fourth Proportional to 1,343.80, 2,016.78 and 979.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.80 : 2,016.78 = 979.96 : x
2. Step 2: Convert to fraction form
   1,343.80/2,016.78 = 979.96/x
3. Step 3: Cross multiply
   1,343.80x = 2,016.78 × 979.96
4. Step 4: Simplify right side
   1,343.80x = 1,976,363.73
5. Step 5: Solve for x
   x = 1,976,363.73/1,343.80
6. Step 6: Final answer
   x = 1,470.73