Finding the Third Proportional to 142,606 and 309,843

Step by Step Solution

1. Step 1: Write the proportion equation
   142,606 : 309,843 = 309,843 : x
2. Step 2: Convert to fraction form
   142,606/309,843 = 309,843/x
3. Step 3: Cross multiply
   142,606x = 309,843 × 309,843
4. Step 4: Simplify right side
   142,606x = 96,002,684,649
5. Step 5: Solve for x
   x = 96,002,684,649/142,606
6. Step 6: Final answer
   x = 673,202.28