Finding the Third Proportional to 140,981 and 218,630

Step by Step Solution

1. Step 1: Write the proportion equation
   140,981 : 218,630 = 218,630 : x
2. Step 2: Convert to fraction form
   140,981/218,630 = 218,630/x
3. Step 3: Cross multiply
   140,981x = 218,630 × 218,630
4. Step 4: Simplify right side
   140,981x = 47,799,076,900
5. Step 5: Solve for x
   x = 47,799,076,900/140,981
6. Step 6: Final answer
   x = 339,046.23