Finding the Third Proportional to 219,878 and 479,256

Step by Step Solution

1. Step 1: Write the proportion equation
   219,878 : 479,256 = 479,256 : x
2. Step 2: Convert to fraction form
   219,878/479,256 = 479,256/x
3. Step 3: Cross multiply
   219,878x = 479,256 × 479,256
4. Step 4: Simplify right side
   219,878x = 229,686,313,536
5. Step 5: Solve for x
   x = 229,686,313,536/219,878
6. Step 6: Final answer
   x = 1,044,607.98