Finding the Third Proportional to 396,462 and 864,136.50

Step by Step Solution

1. Step 1: Write the proportion equation
   396,462 : 864,136.50 = 864,136.50 : x
2. Step 2: Convert to fraction form
   396,462/864,136.50 = 864,136.50/x
3. Step 3: Cross multiply
   396,462x = 864,136.50 × 864,136.50
4. Step 4: Simplify right side
   396,462x = 746,731,890,632.25
5. Step 5: Solve for x
   x = 746,731,890,632.25/396,462
6. Step 6: Final answer
   x = 1,883,489.19