Finding the Fourth Proportional to 2,788.16, 4,183.40 and 1,306.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.16 : 4,183.40 = 1,306.30 : x
2. Step 2: Convert to fraction form
   2,788.16/4,183.40 = 1,306.30/x
3. Step 3: Cross multiply
   2,788.16x = 4,183.40 × 1,306.30
4. Step 4: Simplify right side
   2,788.16x = 5,464,775.42
5. Step 5: Solve for x
   x = 5,464,775.42/2,788.16
6. Step 6: Final answer
   x = 1,959.99