Finding the Third Proportional to 309,364 and 655,334

Step by Step Solution

1. Step 1: Write the proportion equation
   309,364 : 655,334 = 655,334 : x
2. Step 2: Convert to fraction form
   309,364/655,334 = 655,334/x
3. Step 3: Cross multiply
   309,364x = 655,334 × 655,334
4. Step 4: Simplify right side
   309,364x = 429,462,651,556
5. Step 5: Solve for x
   x = 429,462,651,556/309,364
6. Step 6: Final answer
   x = 1,388,211.46