Finding the Third Proportional to 218,398 and 479,626

Step by Step Solution

1. Step 1: Write the proportion equation
   218,398 : 479,626 = 479,626 : x
2. Step 2: Convert to fraction form
   218,398/479,626 = 479,626/x
3. Step 3: Cross multiply
   218,398x = 479,626 × 479,626
4. Step 4: Simplify right side
   218,398x = 230,041,099,876
5. Step 5: Solve for x
   x = 230,041,099,876/218,398
6. Step 6: Final answer
   x = 1,053,311.39