Finding the Fourth Proportional to 2,798.72, 3,863.04 and 1,868.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.72 : 3,863.04 = 1,868.16 : x
2. Step 2: Convert to fraction form
   2,798.72/3,863.04 = 1,868.16/x
3. Step 3: Cross multiply
   2,798.72x = 3,863.04 × 1,868.16
4. Step 4: Simplify right side
   2,798.72x = 7,216,776.81
5. Step 5: Solve for x
   x = 7,216,776.81/2,798.72
6. Step 6: Final answer
   x = 2,578.60