Finding the Third Proportional to 317,628 and 681,300

Step by Step Solution

1. Step 1: Write the proportion equation
   317,628 : 681,300 = 681,300 : x
2. Step 2: Convert to fraction form
   317,628/681,300 = 681,300/x
3. Step 3: Cross multiply
   317,628x = 681,300 × 681,300
4. Step 4: Simplify right side
   317,628x = 464,169,690,000
5. Step 5: Solve for x
   x = 464,169,690,000/317,628
6. Step 6: Final answer
   x = 1,461,362.63