Finding the Fourth Proportional to 2,865.78, 4,297.56 and 1,016.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,865.78 : 4,297.56 = 1,016.55 : x
2. Step 2: Convert to fraction form
   2,865.78/4,297.56 = 1,016.55/x
3. Step 3: Cross multiply
   2,865.78x = 4,297.56 × 1,016.55
4. Step 4: Simplify right side
   2,865.78x = 4,368,684.62
5. Step 5: Solve for x
   x = 4,368,684.62/2,865.78
6. Step 6: Final answer
   x = 1,524.43