Finding the Fourth Proportional to 1,915.57, 2,867.71 and 1,868.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.57 : 2,867.71 = 1,868.41 : x
2. Step 2: Convert to fraction form
   1,915.57/2,867.71 = 1,868.41/x
3. Step 3: Cross multiply
   1,915.57x = 2,867.71 × 1,868.41
4. Step 4: Simplify right side
   1,915.57x = 5,358,058.04
5. Step 5: Solve for x
   x = 5,358,058.04/1,915.57
6. Step 6: Final answer
   x = 2,797.11