Finding the Third Proportional to 218,526 and 479,856

Step by Step Solution

1. Step 1: Write the proportion equation
   218,526 : 479,856 = 479,856 : x
2. Step 2: Convert to fraction form
   218,526/479,856 = 479,856/x
3. Step 3: Cross multiply
   218,526x = 479,856 × 479,856
4. Step 4: Simplify right side
   218,526x = 230,261,780,736
5. Step 5: Solve for x
   x = 230,261,780,736/218,526
6. Step 6: Final answer
   x = 1,053,704.28