Finding the Third Proportional to 309,450 and 659,364

Step by Step Solution

1. Step 1: Write the proportion equation
   309,450 : 659,364 = 659,364 : x
2. Step 2: Convert to fraction form
   309,450/659,364 = 659,364/x
3. Step 3: Cross multiply
   309,450x = 659,364 × 659,364
4. Step 4: Simplify right side
   309,450x = 434,760,884,496
5. Step 5: Solve for x
   x = 434,760,884,496/309,450
6. Step 6: Final answer
   x = 1,404,947.11