Finding the Third Proportional to 140,433 and 300,630

Step by Step Solution

1. Step 1: Write the proportion equation
   140,433 : 300,630 = 300,630 : x
2. Step 2: Convert to fraction form
   140,433/300,630 = 300,630/x
3. Step 3: Cross multiply
   140,433x = 300,630 × 300,630
4. Step 4: Simplify right side
   140,433x = 90,378,396,900
5. Step 5: Solve for x
   x = 90,378,396,900/140,433
6. Step 6: Final answer
   x = 643,569.51