Finding the Third Proportional to 660.66 and 1,394.72

Step by Step Solution

1. Step 1: Write the proportion equation
   660.66 : 1,394.72 = 1,394.72 : x
2. Step 2: Convert to fraction form
   660.66/1,394.72 = 1,394.72/x
3. Step 3: Cross multiply
   660.66x = 1,394.72 × 1,394.72
4. Step 4: Simplify right side
   660.66x = 1,945,240.39
5. Step 5: Solve for x
   x = 1,945,240.39/660.66
6. Step 6: Final answer
   x = 2,944.41