Finding the Third Proportional to 317,919 and 445,594.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,919 : 445,594.50 = 445,594.50 : x
2. Step 2: Convert to fraction form
   317,919/445,594.50 = 445,594.50/x
3. Step 3: Cross multiply
   317,919x = 445,594.50 × 445,594.50
4. Step 4: Simplify right side
   317,919x = 198,554,458,430.25
5. Step 5: Solve for x
   x = 198,554,458,430.25/317,919
6. Step 6: Final answer
   x = 624,544.17