Finding the Third Proportional to 129,708 and 200,404.13

Step by Step Solution

1. Step 1: Write the proportion equation
   129,708 : 200,404.13 = 200,404.13 : x
2. Step 2: Convert to fraction form
   129,708/200,404.13 = 200,404.13/x
3. Step 3: Cross multiply
   129,708x = 200,404.13 × 200,404.13
4. Step 4: Simplify right side
   129,708x = 40,161,813,317.02
5. Step 5: Solve for x
   x = 40,161,813,317.02/129,708
6. Step 6: Final answer
   x = 309,632.51