Finding the Third Proportional to 16,689.50 and 33,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,689.50 : 33,839.50 = 33,839.50 : x
2. Step 2: Convert to fraction form
   16,689.50/33,839.50 = 33,839.50/x
3. Step 3: Cross multiply
   16,689.50x = 33,839.50 × 33,839.50
4. Step 4: Simplify right side
   16,689.50x = 1,145,111,760.25
5. Step 5: Solve for x
   x = 1,145,111,760.25/16,689.50
6. Step 6: Final answer
   x = 68,612.71