Finding the Fourth Proportional to 2,685.42, 4,028.83 and 836.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.42 : 4,028.83 = 836.56 : x
2. Step 2: Convert to fraction form
   2,685.42/4,028.83 = 836.56/x
3. Step 3: Cross multiply
   2,685.42x = 4,028.83 × 836.56
4. Step 4: Simplify right side
   2,685.42x = 3,370,363.91
5. Step 5: Solve for x
   x = 3,370,363.91/2,685.42
6. Step 6: Final answer
   x = 1,255.06