Finding the Fourth Proportional to 2,818.56, 4,227.02 and 1,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,818.56 : 4,227.02 = 1,086.78 : x
2. Step 2: Convert to fraction form
   2,818.56/4,227.02 = 1,086.78/x
3. Step 3: Cross multiply
   2,818.56x = 4,227.02 × 1,086.78
4. Step 4: Simplify right side
   2,818.56x = 4,593,840.80
5. Step 5: Solve for x
   x = 4,593,840.80/2,818.56
6. Step 6: Final answer
   x = 1,629.85