Finding the Third Proportional to 300,821 and 668,884

Step by Step Solution

1. Step 1: Write the proportion equation
   300,821 : 668,884 = 668,884 : x
2. Step 2: Convert to fraction form
   300,821/668,884 = 668,884/x
3. Step 3: Cross multiply
   300,821x = 668,884 × 668,884
4. Step 4: Simplify right side
   300,821x = 447,405,805,456
5. Step 5: Solve for x
   x = 447,405,805,456/300,821
6. Step 6: Final answer
   x = 1,487,282.49