Finding the Third Proportional to 217,636 and 479,404

Step by Step Solution

1. Step 1: Write the proportion equation
   217,636 : 479,404 = 479,404 : x
2. Step 2: Convert to fraction form
   217,636/479,404 = 479,404/x
3. Step 3: Cross multiply
   217,636x = 479,404 × 479,404
4. Step 4: Simplify right side
   217,636x = 229,828,195,216
5. Step 5: Solve for x
   x = 229,828,195,216/217,636
6. Step 6: Final answer
   x = 1,056,021.04