Finding the Fourth Proportional to 3,863.94, 5,797.78 and 1,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863.94 : 5,797.78 = 1,915.72 : x
2. Step 2: Convert to fraction form
   3,863.94/5,797.78 = 1,915.72/x
3. Step 3: Cross multiply
   3,863.94x = 5,797.78 × 1,915.72
4. Step 4: Simplify right side
   3,863.94x = 11,106,923.10
5. Step 5: Solve for x
   x = 11,106,923.10/3,863.94
6. Step 6: Final answer
   x = 2,874.51