Finding the Third Proportional to 217,486 and 479,122

Step by Step Solution

1. Step 1: Write the proportion equation
   217,486 : 479,122 = 479,122 : x
2. Step 2: Convert to fraction form
   217,486/479,122 = 479,122/x
3. Step 3: Cross multiply
   217,486x = 479,122 × 479,122
4. Step 4: Simplify right side
   217,486x = 229,557,890,884
5. Step 5: Solve for x
   x = 229,557,890,884/217,486
6. Step 6: Final answer
   x = 1,055,506.52