Finding the Third Proportional to 140,728 and 301,140

Step by Step Solution

1. Step 1: Write the proportion equation
   140,728 : 301,140 = 301,140 : x
2. Step 2: Convert to fraction form
   140,728/301,140 = 301,140/x
3. Step 3: Cross multiply
   140,728x = 301,140 × 301,140
4. Step 4: Simplify right side
   140,728x = 90,685,299,600
5. Step 5: Solve for x
   x = 90,685,299,600/140,728
6. Step 6: Final answer
   x = 644,401.25