Finding the Third Proportional to 116,689.50 and 238,306.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,689.50 : 238,306.50 = 238,306.50 : x
2. Step 2: Convert to fraction form
   116,689.50/238,306.50 = 238,306.50/x
3. Step 3: Cross multiply
   116,689.50x = 238,306.50 × 238,306.50
4. Step 4: Simplify right side
   116,689.50x = 56,789,987,942.25
5. Step 5: Solve for x
   x = 56,789,987,942.25/116,689.50
6. Step 6: Final answer
   x = 486,676.08