Finding the Third Proportional to 89,691 and 140,715

Step by Step Solution

1. Step 1: Write the proportion equation
   89,691 : 140,715 = 140,715 : x
2. Step 2: Convert to fraction form
   89,691/140,715 = 140,715/x
3. Step 3: Cross multiply
   89,691x = 140,715 × 140,715
4. Step 4: Simplify right side
   89,691x = 19,800,711,225
5. Step 5: Solve for x
   x = 19,800,711,225/89,691
6. Step 6: Final answer
   x = 220,765.87