Finding the Third Proportional to 300,980 and 626,870

Step by Step Solution

1. Step 1: Write the proportion equation
   300,980 : 626,870 = 626,870 : x
2. Step 2: Convert to fraction form
   300,980/626,870 = 626,870/x
3. Step 3: Cross multiply
   300,980x = 626,870 × 626,870
4. Step 4: Simplify right side
   300,980x = 392,965,996,900
5. Step 5: Solve for x
   x = 392,965,996,900/300,980
6. Step 6: Final answer
   x = 1,305,621.63