Finding the Third Proportional to 140,464 and 300,612

Step by Step Solution

1. Step 1: Write the proportion equation
   140,464 : 300,612 = 300,612 : x
2. Step 2: Convert to fraction form
   140,464/300,612 = 300,612/x
3. Step 3: Cross multiply
   140,464x = 300,612 × 300,612
4. Step 4: Simplify right side
   140,464x = 90,367,574,544
5. Step 5: Solve for x
   x = 90,367,574,544/140,464
6. Step 6: Final answer
   x = 643,350.43