Finding the Third Proportional to 90,202 and 140,218

Step by Step Solution

1. Step 1: Write the proportion equation
   90,202 : 140,218 = 140,218 : x
2. Step 2: Convert to fraction form
   90,202/140,218 = 140,218/x
3. Step 3: Cross multiply
   90,202x = 140,218 × 140,218
4. Step 4: Simplify right side
   90,202x = 19,661,087,524
5. Step 5: Solve for x
   x = 19,661,087,524/90,202
6. Step 6: Final answer
   x = 217,967.31