Finding the Third Proportional to 308,994 and 677,020

Step by Step Solution

1. Step 1: Write the proportion equation
   308,994 : 677,020 = 677,020 : x
2. Step 2: Convert to fraction form
   308,994/677,020 = 677,020/x
3. Step 3: Cross multiply
   308,994x = 677,020 × 677,020
4. Step 4: Simplify right side
   308,994x = 458,356,080,400
5. Step 5: Solve for x
   x = 458,356,080,400/308,994
6. Step 6: Final answer
   x = 1,483,381.81