Finding the Third Proportional to 394,464 and 864,012

Step by Step Solution

1. Step 1: Write the proportion equation
   394,464 : 864,012 = 864,012 : x
2. Step 2: Convert to fraction form
   394,464/864,012 = 864,012/x
3. Step 3: Cross multiply
   394,464x = 864,012 × 864,012
4. Step 4: Simplify right side
   394,464x = 746,516,736,144
5. Step 5: Solve for x
   x = 746,516,736,144/394,464
6. Step 6: Final answer
   x = 1,892,483.82