Finding the Third Proportional to 142,877.25 and 313,956

Step by Step Solution

1. Step 1: Write the proportion equation
   142,877.25 : 313,956 = 313,956 : x
2. Step 2: Convert to fraction form
   142,877.25/313,956 = 313,956/x
3. Step 3: Cross multiply
   142,877.25x = 313,956 × 313,956
4. Step 4: Simplify right side
   142,877.25x = 98,568,369,936
5. Step 5: Solve for x
   x = 98,568,369,936/142,877.25
6. Step 6: Final answer
   x = 689,881.49