Finding the Third Proportional to 140,389 and 300,874

Step by Step Solution

1. Step 1: Write the proportion equation
   140,389 : 300,874 = 300,874 : x
2. Step 2: Convert to fraction form
   140,389/300,874 = 300,874/x
3. Step 3: Cross multiply
   140,389x = 300,874 × 300,874
4. Step 4: Simplify right side
   140,389x = 90,525,163,876
5. Step 5: Solve for x
   x = 90,525,163,876/140,389
6. Step 6: Final answer
   x = 644,816.64