Finding the Third Proportional to 140,948 and 218,388

Step by Step Solution

1. Step 1: Write the proportion equation
   140,948 : 218,388 = 218,388 : x
2. Step 2: Convert to fraction form
   140,948/218,388 = 218,388/x
3. Step 3: Cross multiply
   140,948x = 218,388 × 218,388
4. Step 4: Simplify right side
   140,948x = 47,693,318,544
5. Step 5: Solve for x
   x = 47,693,318,544/140,948
6. Step 6: Final answer
   x = 338,375.28