Finding the Fourth Proportional to 2,749.29, 4,123.89 and 669.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,749.29 : 4,123.89 = 669.28 : x
2. Step 2: Convert to fraction form
   2,749.29/4,123.89 = 669.28/x
3. Step 3: Cross multiply
   2,749.29x = 4,123.89 × 669.28
4. Step 4: Simplify right side
   2,749.29x = 2,760,037.10
5. Step 5: Solve for x
   x = 2,760,037.10/2,749.29
6. Step 6: Final answer
   x = 1,003.91