Finding the Fourth Proportional to 2,711.42, 4,067.75 and 980.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.42 : 4,067.75 = 980.05 : x
2. Step 2: Convert to fraction form
   2,711.42/4,067.75 = 980.05/x
3. Step 3: Cross multiply
   2,711.42x = 4,067.75 × 980.05
4. Step 4: Simplify right side
   2,711.42x = 3,986,573.15
5. Step 5: Solve for x
   x = 3,986,573.15/2,711.42
6. Step 6: Final answer
   x = 1,470.29