Finding the Fourth Proportional to 2,766.80, 4,151.01 and 819.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,766.80 : 4,151.01 = 819.05 : x
2. Step 2: Convert to fraction form
   2,766.80/4,151.01 = 819.05/x
3. Step 3: Cross multiply
   2,766.80x = 4,151.01 × 819.05
4. Step 4: Simplify right side
   2,766.80x = 3,399,885.80
5. Step 5: Solve for x
   x = 3,399,885.80/2,766.80
6. Step 6: Final answer
   x = 1,228.82