Finding the Fourth Proportional to 2,788.92, 4,185.81 and 1,328.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.92 : 4,185.81 = 1,328.76 : x
2. Step 2: Convert to fraction form
   2,788.92/4,185.81 = 1,328.76/x
3. Step 3: Cross multiply
   2,788.92x = 4,185.81 × 1,328.76
4. Step 4: Simplify right side
   2,788.92x = 5,561,936.90
5. Step 5: Solve for x
   x = 5,561,936.90/2,788.92
6. Step 6: Final answer
   x = 1,994.30