Finding the Third Proportional to 140,459 and 309,549

Step by Step Solution

1. Step 1: Write the proportion equation
   140,459 : 309,549 = 309,549 : x
2. Step 2: Convert to fraction form
   140,459/309,549 = 309,549/x
3. Step 3: Cross multiply
   140,459x = 309,549 × 309,549
4. Step 4: Simplify right side
   140,459x = 95,820,583,401
5. Step 5: Solve for x
   x = 95,820,583,401/140,459
6. Step 6: Final answer
   x = 682,196.11