Finding the Third Proportional to 313,061 and 685,162

Step by Step Solution

1. Step 1: Write the proportion equation
   313,061 : 685,162 = 685,162 : x
2. Step 2: Convert to fraction form
   313,061/685,162 = 685,162/x
3. Step 3: Cross multiply
   313,061x = 685,162 × 685,162
4. Step 4: Simplify right side
   313,061x = 469,446,966,244
5. Step 5: Solve for x
   x = 469,446,966,244/313,061
6. Step 6: Final answer
   x = 1,499,538.32