Finding the Third Proportional to 428,844 and 628,942

Step by Step Solution

1. Step 1: Write the proportion equation
   428,844 : 628,942 = 628,942 : x
2. Step 2: Convert to fraction form
   428,844/628,942 = 628,942/x
3. Step 3: Cross multiply
   428,844x = 628,942 × 628,942
4. Step 4: Simplify right side
   428,844x = 395,568,039,364
5. Step 5: Solve for x
   x = 395,568,039,364/428,844
6. Step 6: Final answer
   x = 922,405.44