Finding the Third Proportional to 111,686 and 240,868

Step by Step Solution

1. Step 1: Write the proportion equation
   111,686 : 240,868 = 240,868 : x
2. Step 2: Convert to fraction form
   111,686/240,868 = 240,868/x
3. Step 3: Cross multiply
   111,686x = 240,868 × 240,868
4. Step 4: Simplify right side
   111,686x = 58,017,393,424
5. Step 5: Solve for x
   x = 58,017,393,424/111,686
6. Step 6: Final answer
   x = 519,468.81