Finding the Third Proportional to 111,786 and 240,218

Step by Step Solution

1. Step 1: Write the proportion equation
   111,786 : 240,218 = 240,218 : x
2. Step 2: Convert to fraction form
   111,786/240,218 = 240,218/x
3. Step 3: Cross multiply
   111,786x = 240,218 × 240,218
4. Step 4: Simplify right side
   111,786x = 57,704,687,524
5. Step 5: Solve for x
   x = 57,704,687,524/111,786
6. Step 6: Final answer
   x = 516,206.75