Finding the Third Proportional to 142,055 and 315,640

Step by Step Solution

1. Step 1: Write the proportion equation
   142,055 : 315,640 = 315,640 : x
2. Step 2: Convert to fraction form
   142,055/315,640 = 315,640/x
3. Step 3: Cross multiply
   142,055x = 315,640 × 315,640
4. Step 4: Simplify right side
   142,055x = 99,628,609,600
5. Step 5: Solve for x
   x = 99,628,609,600/142,055
6. Step 6: Final answer
   x = 701,338.28