Finding the Third Proportional to 300,864.75 and 655,689

Step by Step Solution

1. Step 1: Write the proportion equation
   300,864.75 : 655,689 = 655,689 : x
2. Step 2: Convert to fraction form
   300,864.75/655,689 = 655,689/x
3. Step 3: Cross multiply
   300,864.75x = 655,689 × 655,689
4. Step 4: Simplify right side
   300,864.75x = 429,928,064,721
5. Step 5: Solve for x
   x = 429,928,064,721/300,864.75
6. Step 6: Final answer
   x = 1,428,974.53