Finding the Third Proportional to 90,690 and 140,771

Step by Step Solution

1. Step 1: Write the proportion equation
   90,690 : 140,771 = 140,771 : x
2. Step 2: Convert to fraction form
   90,690/140,771 = 140,771/x
3. Step 3: Cross multiply
   90,690x = 140,771 × 140,771
4. Step 4: Simplify right side
   90,690x = 19,816,474,441
5. Step 5: Solve for x
   x = 19,816,474,441/90,690
6. Step 6: Final answer
   x = 218,507.82