Finding the Third Proportional to 111,687 and 238,956

Step by Step Solution

1. Step 1: Write the proportion equation
   111,687 : 238,956 = 238,956 : x
2. Step 2: Convert to fraction form
   111,687/238,956 = 238,956/x
3. Step 3: Cross multiply
   111,687x = 238,956 × 238,956
4. Step 4: Simplify right side
   111,687x = 57,099,969,936
5. Step 5: Solve for x
   x = 57,099,969,936/111,687
6. Step 6: Final answer
   x = 511,249.92