Finding the Third Proportional to 393,462 and 814,906.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,462 : 814,906.50 = 814,906.50 : x
2. Step 2: Convert to fraction form
   393,462/814,906.50 = 814,906.50/x
3. Step 3: Cross multiply
   393,462x = 814,906.50 × 814,906.50
4. Step 4: Simplify right side
   393,462x = 664,072,603,742.25
5. Step 5: Solve for x
   x = 664,072,603,742.25/393,462
6. Step 6: Final answer
   x = 1,687,768.08