Finding the Third Proportional to 442,926 and 687,150

Step by Step Solution

1. Step 1: Write the proportion equation
   442,926 : 687,150 = 687,150 : x
2. Step 2: Convert to fraction form
   442,926/687,150 = 687,150/x
3. Step 3: Cross multiply
   442,926x = 687,150 × 687,150
4. Step 4: Simplify right side
   442,926x = 472,175,122,500
5. Step 5: Solve for x
   x = 472,175,122,500/442,926
6. Step 6: Final answer
   x = 1,066,036.14