Finding the Third Proportional to 142,756 and 310,936

Step by Step Solution

1. Step 1: Write the proportion equation
   142,756 : 310,936 = 310,936 : x
2. Step 2: Convert to fraction form
   142,756/310,936 = 310,936/x
3. Step 3: Cross multiply
   142,756x = 310,936 × 310,936
4. Step 4: Simplify right side
   142,756x = 96,681,196,096
5. Step 5: Solve for x
   x = 96,681,196,096/142,756
6. Step 6: Final answer
   x = 677,247.86