Finding the Third Proportional to 217,812 and 479,768

Step by Step Solution

1. Step 1: Write the proportion equation
   217,812 : 479,768 = 479,768 : x
2. Step 2: Convert to fraction form
   217,812/479,768 = 479,768/x
3. Step 3: Cross multiply
   217,812x = 479,768 × 479,768
4. Step 4: Simplify right side
   217,812x = 230,177,333,824
5. Step 5: Solve for x
   x = 230,177,333,824/217,812
6. Step 6: Final answer
   x = 1,056,770.67