Finding the Third Proportional to 200,908 and 422,504

Step by Step Solution

1. Step 1: Write the proportion equation
   200,908 : 422,504 = 422,504 : x
2. Step 2: Convert to fraction form
   200,908/422,504 = 422,504/x
3. Step 3: Cross multiply
   200,908x = 422,504 × 422,504
4. Step 4: Simplify right side
   200,908x = 178,509,630,016
5. Step 5: Solve for x
   x = 178,509,630,016/200,908
6. Step 6: Final answer
   x = 888,514.30