Finding the Third Proportional to 89,812 and 188,921

Step by Step Solution

1. Step 1: Write the proportion equation
   89,812 : 188,921 = 188,921 : x
2. Step 2: Convert to fraction form
   89,812/188,921 = 188,921/x
3. Step 3: Cross multiply
   89,812x = 188,921 × 188,921
4. Step 4: Simplify right side
   89,812x = 35,691,144,241
5. Step 5: Solve for x
   x = 35,691,144,241/89,812
6. Step 6: Final answer
   x = 397,398.39