Finding the Third Proportional to 317,531.50 and 684,919

Step by Step Solution

1. Step 1: Write the proportion equation
   317,531.50 : 684,919 = 684,919 : x
2. Step 2: Convert to fraction form
   317,531.50/684,919 = 684,919/x
3. Step 3: Cross multiply
   317,531.50x = 684,919 × 684,919
4. Step 4: Simplify right side
   317,531.50x = 469,114,036,561
5. Step 5: Solve for x
   x = 469,114,036,561/317,531.50
6. Step 6: Final answer
   x = 1,477,377.95