Finding the Third Proportional to 394,462 and 864,008

Step by Step Solution

1. Step 1: Write the proportion equation
   394,462 : 864,008 = 864,008 : x
2. Step 2: Convert to fraction form
   394,462/864,008 = 864,008/x
3. Step 3: Cross multiply
   394,462x = 864,008 × 864,008
4. Step 4: Simplify right side
   394,462x = 746,509,824,064
5. Step 5: Solve for x
   x = 746,509,824,064/394,462
6. Step 6: Final answer
   x = 1,892,475.89