Finding the Third Proportional to 217,488 and 479,126

Step by Step Solution

1. Step 1: Write the proportion equation
   217,488 : 479,126 = 479,126 : x
2. Step 2: Convert to fraction form
   217,488/479,126 = 479,126/x
3. Step 3: Cross multiply
   217,488x = 479,126 × 479,126
4. Step 4: Simplify right side
   217,488x = 229,561,723,876
5. Step 5: Solve for x
   x = 229,561,723,876/217,488
6. Step 6: Final answer
   x = 1,055,514.44