Finding the Third Proportional to 90,499.50 and 195,021

Step by Step Solution

1. Step 1: Write the proportion equation
   90,499.50 : 195,021 = 195,021 : x
2. Step 2: Convert to fraction form
   90,499.50/195,021 = 195,021/x
3. Step 3: Cross multiply
   90,499.50x = 195,021 × 195,021
4. Step 4: Simplify right side
   90,499.50x = 38,033,190,441
5. Step 5: Solve for x
   x = 38,033,190,441/90,499.50
6. Step 6: Final answer
   x = 420,258.57