Finding the Third Proportional to 111,687 and 238,955

Step by Step Solution

1. Step 1: Write the proportion equation
   111,687 : 238,955 = 238,955 : x
2. Step 2: Convert to fraction form
   111,687/238,955 = 238,955/x
3. Step 3: Cross multiply
   111,687x = 238,955 × 238,955
4. Step 4: Simplify right side
   111,687x = 57,099,492,025
5. Step 5: Solve for x
   x = 57,099,492,025/111,687
6. Step 6: Final answer
   x = 511,245.64