Finding the Fourth Proportional to 2,863.71, 3,951.05 and 1,868.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,863.71 : 3,951.05 = 1,868.63 : x
2. Step 2: Convert to fraction form
   2,863.71/3,951.05 = 1,868.63/x
3. Step 3: Cross multiply
   2,863.71x = 3,951.05 × 1,868.63
4. Step 4: Simplify right side
   2,863.71x = 7,383,021.46
5. Step 5: Solve for x
   x = 7,383,021.46/2,863.71
6. Step 6: Final answer
   x = 2,578.13