Finding the Fourth Proportional to 2,865.09, 4,297.56 and 917.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.09 : 4,297.56 = 917.27 : x
2. Step 2: Convert to fraction form
   2,865.09/4,297.56 = 917.27/x
3. Step 3: Cross multiply
   2,865.09x = 4,297.56 × 917.27
4. Step 4: Simplify right side
   2,865.09x = 3,942,022.86
5. Step 5: Solve for x
   x = 3,942,022.86/2,865.09
6. Step 6: Final answer
   x = 1,375.88