Finding the Third Proportional to 140,218 and 217,530

Step by Step Solution

1. Step 1: Write the proportion equation
   140,218 : 217,530 = 217,530 : x
2. Step 2: Convert to fraction form
   140,218/217,530 = 217,530/x
3. Step 3: Cross multiply
   140,218x = 217,530 × 217,530
4. Step 4: Simplify right side
   140,218x = 47,319,300,900
5. Step 5: Solve for x
   x = 47,319,300,900/140,218
6. Step 6: Final answer
   x = 337,469.52