Finding the Fourth Proportional to 2,028.78, 2,799.56 and 1,144.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.78 : 2,799.56 = 1,144.67 : x
2. Step 2: Convert to fraction form
   2,028.78/2,799.56 = 1,144.67/x
3. Step 3: Cross multiply
   2,028.78x = 2,799.56 × 1,144.67
4. Step 4: Simplify right side
   2,028.78x = 3,204,561.21
5. Step 5: Solve for x
   x = 3,204,561.21/2,028.78
6. Step 6: Final answer
   x = 1,579.55