Finding the Third Proportional to 116,989.50 and 239,524.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,989.50 : 239,524.50 = 239,524.50 : x
2. Step 2: Convert to fraction form
   116,989.50/239,524.50 = 239,524.50/x
3. Step 3: Cross multiply
   116,989.50x = 239,524.50 × 239,524.50
4. Step 4: Simplify right side
   116,989.50x = 57,371,986,100.25
5. Step 5: Solve for x
   x = 57,371,986,100.25/116,989.50
6. Step 6: Final answer
   x = 490,402.87