Finding the Fourth Proportional to 2,685.89, 4,028.97 and 738.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.89 : 4,028.97 = 738.05 : x
2. Step 2: Convert to fraction form
   2,685.89/4,028.97 = 738.05/x
3. Step 3: Cross multiply
   2,685.89x = 4,028.97 × 738.05
4. Step 4: Simplify right side
   2,685.89x = 2,973,581.31
5. Step 5: Solve for x
   x = 2,973,581.31/2,685.89
6. Step 6: Final answer
   x = 1,107.11