Finding the Fourth Proportional to 2,865.89, 4,297.82 and 917.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.89 : 4,297.82 = 917.57 : x
2. Step 2: Convert to fraction form
   2,865.89/4,297.82 = 917.57/x
3. Step 3: Cross multiply
   2,865.89x = 4,297.82 × 917.57
4. Step 4: Simplify right side
   2,865.89x = 3,943,524.62
5. Step 5: Solve for x
   x = 3,943,524.62/2,865.89
6. Step 6: Final answer
   x = 1,376.02