Finding the Third Proportional to 405,732 and 631,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405,732 : 631,561.50 = 631,561.50 : x
2. Step 2: Convert to fraction form
   405,732/631,561.50 = 631,561.50/x
3. Step 3: Cross multiply
   405,732x = 631,561.50 × 631,561.50
4. Step 4: Simplify right side
   405,732x = 398,869,928,282.25
5. Step 5: Solve for x
   x = 398,869,928,282.25/405,732
6. Step 6: Final answer
   x = 983,087.18