Finding the Fourth Proportional to 2,865.02, 4,297.55 and 917.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.02 : 4,297.55 = 917.30 : x
2. Step 2: Convert to fraction form
   2,865.02/4,297.55 = 917.30/x
3. Step 3: Cross multiply
   2,865.02x = 4,297.55 × 917.30
4. Step 4: Simplify right side
   2,865.02x = 3,942,142.62
5. Step 5: Solve for x
   x = 3,942,142.62/2,865.02
6. Step 6: Final answer
   x = 1,375.96