Finding the Third Proportional to 140,247 and 300,588

Step by Step Solution

1. Step 1: Write the proportion equation
   140,247 : 300,588 = 300,588 : x
2. Step 2: Convert to fraction form
   140,247/300,588 = 300,588/x
3. Step 3: Cross multiply
   140,247x = 300,588 × 300,588
4. Step 4: Simplify right side
   140,247x = 90,353,145,744
5. Step 5: Solve for x
   x = 90,353,145,744/140,247
6. Step 6: Final answer
   x = 644,242.98