Finding the Third Proportional to 399,042 and 886,662

Step by Step Solution

1. Step 1: Write the proportion equation
   399,042 : 886,662 = 886,662 : x
2. Step 2: Convert to fraction form
   399,042/886,662 = 886,662/x
3. Step 3: Cross multiply
   399,042x = 886,662 × 886,662
4. Step 4: Simplify right side
   399,042x = 786,169,502,244
5. Step 5: Solve for x
   x = 786,169,502,244/399,042
6. Step 6: Final answer
   x = 1,970,142.25