Finding the Third Proportional to 140,446 and 300,574

Step by Step Solution

1. Step 1: Write the proportion equation
   140,446 : 300,574 = 300,574 : x
2. Step 2: Convert to fraction form
   140,446/300,574 = 300,574/x
3. Step 3: Cross multiply
   140,446x = 300,574 × 300,574
4. Step 4: Simplify right side
   140,446x = 90,344,729,476
5. Step 5: Solve for x
   x = 90,344,729,476/140,446
6. Step 6: Final answer
   x = 643,270.22