Finding the Fourth Proportional to 2,074.88, 2,863.22 and 1,288.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.88 : 2,863.22 = 1,288.92 : x
2. Step 2: Convert to fraction form
   2,074.88/2,863.22 = 1,288.92/x
3. Step 3: Cross multiply
   2,074.88x = 2,863.22 × 1,288.92
4. Step 4: Simplify right side
   2,074.88x = 3,690,461.52
5. Step 5: Solve for x
   x = 3,690,461.52/2,074.88
6. Step 6: Final answer
   x = 1,778.64