Finding the Third Proportional to 666 and 1,404.38

Step by Step Solution

1. Step 1: Write the proportion equation
   666 : 1,404.38 = 1,404.38 : x
2. Step 2: Convert to fraction form
   666/1,404.38 = 1,404.38/x
3. Step 3: Cross multiply
   666x = 1,404.38 × 1,404.38
4. Step 4: Simplify right side
   666x = 1,972,269.14
5. Step 5: Solve for x
   x = 1,972,269.14/666
6. Step 6: Final answer
   x = 2,961.37