Finding the Third Proportional to 300,738 and 649,860

Step by Step Solution

1. Step 1: Write the proportion equation
   300,738 : 649,860 = 649,860 : x
2. Step 2: Convert to fraction form
   300,738/649,860 = 649,860/x
3. Step 3: Cross multiply
   300,738x = 649,860 × 649,860
4. Step 4: Simplify right side
   300,738x = 422,318,019,600
5. Step 5: Solve for x
   x = 422,318,019,600/300,738
6. Step 6: Final answer
   x = 1,404,272.22