Finding the Third Proportional to 90,469 and 140,591

Step by Step Solution

1. Step 1: Write the proportion equation
   90,469 : 140,591 = 140,591 : x
2. Step 2: Convert to fraction form
   90,469/140,591 = 140,591/x
3. Step 3: Cross multiply
   90,469x = 140,591 × 140,591
4. Step 4: Simplify right side
   90,469x = 19,765,829,281
5. Step 5: Solve for x
   x = 19,765,829,281/90,469
6. Step 6: Final answer
   x = 218,481.79