Finding the Fourth Proportional to 2,748.72, 4,123.02 and 668.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.72 : 4,123.02 = 668.73 : x
2. Step 2: Convert to fraction form
   2,748.72/4,123.02 = 668.73/x
3. Step 3: Cross multiply
   2,748.72x = 4,123.02 × 668.73
4. Step 4: Simplify right side
   2,748.72x = 2,757,205.29
5. Step 5: Solve for x
   x = 2,757,205.29/2,748.72
6. Step 6: Final answer
   x = 1,003.09