Finding the Third Proportional to 111,217.50 and 231,651

Step by Step Solution

1. Step 1: Write the proportion equation
   111,217.50 : 231,651 = 231,651 : x
2. Step 2: Convert to fraction form
   111,217.50/231,651 = 231,651/x
3. Step 3: Cross multiply
   111,217.50x = 231,651 × 231,651
4. Step 4: Simplify right side
   111,217.50x = 53,662,185,801
5. Step 5: Solve for x
   x = 53,662,185,801/111,217.50
6. Step 6: Final answer
   x = 482,497.68