Finding the Third Proportional to 317,191.50 and 697,472

Step by Step Solution

1. Step 1: Write the proportion equation
   317,191.50 : 697,472 = 697,472 : x
2. Step 2: Convert to fraction form
   317,191.50/697,472 = 697,472/x
3. Step 3: Cross multiply
   317,191.50x = 697,472 × 697,472
4. Step 4: Simplify right side
   317,191.50x = 486,467,190,784
5. Step 5: Solve for x
   x = 486,467,190,784/317,191.50
6. Step 6: Final answer
   x = 1,533,670.32