Finding the Third Proportional to 129,136.50 and 188,568

Step by Step Solution

1. Step 1: Write the proportion equation
   129,136.50 : 188,568 = 188,568 : x
2. Step 2: Convert to fraction form
   129,136.50/188,568 = 188,568/x
3. Step 3: Cross multiply
   129,136.50x = 188,568 × 188,568
4. Step 4: Simplify right side
   129,136.50x = 35,557,890,624
5. Step 5: Solve for x
   x = 35,557,890,624/129,136.50
6. Step 6: Final answer
   x = 275,351.20