Finding the Fourth Proportional to 2,711.92, 4,068.50 and 980.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.92 : 4,068.50 = 980.55 : x
2. Step 2: Convert to fraction form
   2,711.92/4,068.50 = 980.55/x
3. Step 3: Cross multiply
   2,711.92x = 4,068.50 × 980.55
4. Step 4: Simplify right side
   2,711.92x = 3,989,367.68
5. Step 5: Solve for x
   x = 3,989,367.68/2,711.92
6. Step 6: Final answer
   x = 1,471.05