Finding the Third Proportional to 142,058 and 315,644

Step by Step Solution

1. Step 1: Write the proportion equation
   142,058 : 315,644 = 315,644 : x
2. Step 2: Convert to fraction form
   142,058/315,644 = 315,644/x
3. Step 3: Cross multiply
   142,058x = 315,644 × 315,644
4. Step 4: Simplify right side
   142,058x = 99,631,134,736
5. Step 5: Solve for x
   x = 99,631,134,736/142,058
6. Step 6: Final answer
   x = 701,341.25