Finding the Third Proportional to 320,065.50 and 697,731

Step by Step Solution

1. Step 1: Write the proportion equation
   320,065.50 : 697,731 = 697,731 : x
2. Step 2: Convert to fraction form
   320,065.50/697,731 = 697,731/x
3. Step 3: Cross multiply
   320,065.50x = 697,731 × 697,731
4. Step 4: Simplify right side
   320,065.50x = 486,828,548,361
5. Step 5: Solve for x
   x = 486,828,548,361/320,065.50
6. Step 6: Final answer
   x = 1,521,027.88