Finding the Third Proportional to 142,922 and 313,870

Step by Step Solution

1. Step 1: Write the proportion equation
   142,922 : 313,870 = 313,870 : x
2. Step 2: Convert to fraction form
   142,922/313,870 = 313,870/x
3. Step 3: Cross multiply
   142,922x = 313,870 × 313,870
4. Step 4: Simplify right side
   142,922x = 98,514,376,900
5. Step 5: Solve for x
   x = 98,514,376,900/142,922
6. Step 6: Final answer
   x = 689,287.70