Finding the Third Proportional to 317,960 and 681,988.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,960 : 681,988.50 = 681,988.50 : x
2. Step 2: Convert to fraction form
   317,960/681,988.50 = 681,988.50/x
3. Step 3: Cross multiply
   317,960x = 681,988.50 × 681,988.50
4. Step 4: Simplify right side
   317,960x = 465,108,314,132.25
5. Step 5: Solve for x
   x = 465,108,314,132.25/317,960
6. Step 6: Final answer
   x = 1,462,788.76