Finding the Third Proportional to 140,287 and 300,673

Step by Step Solution

1. Step 1: Write the proportion equation
   140,287 : 300,673 = 300,673 : x
2. Step 2: Convert to fraction form
   140,287/300,673 = 300,673/x
3. Step 3: Cross multiply
   140,287x = 300,673 × 300,673
4. Step 4: Simplify right side
   140,287x = 90,404,252,929
5. Step 5: Solve for x
   x = 90,404,252,929/140,287
6. Step 6: Final answer
   x = 644,423.60