Finding the Third Proportional to 211,325 and 309,401

Step by Step Solution

1. Step 1: Write the proportion equation
   211,325 : 309,401 = 309,401 : x
2. Step 2: Convert to fraction form
   211,325/309,401 = 309,401/x
3. Step 3: Cross multiply
   211,325x = 309,401 × 309,401
4. Step 4: Simplify right side
   211,325x = 95,728,978,801
5. Step 5: Solve for x
   x = 95,728,978,801/211,325
6. Step 6: Final answer
   x = 452,994.10