Finding the Third Proportional to 111,257 and 231,718

Step by Step Solution

1. Step 1: Write the proportion equation
   111,257 : 231,718 = 231,718 : x
2. Step 2: Convert to fraction form
   111,257/231,718 = 231,718/x
3. Step 3: Cross multiply
   111,257x = 231,718 × 231,718
4. Step 4: Simplify right side
   111,257x = 53,693,231,524
5. Step 5: Solve for x
   x = 53,693,231,524/111,257
6. Step 6: Final answer
   x = 482,605.42