Finding the Third Proportional to 90,578 and 195,736

Step by Step Solution

1. Step 1: Write the proportion equation
   90,578 : 195,736 = 195,736 : x
2. Step 2: Convert to fraction form
   90,578/195,736 = 195,736/x
3. Step 3: Cross multiply
   90,578x = 195,736 × 195,736
4. Step 4: Simplify right side
   90,578x = 38,312,581,696
5. Step 5: Solve for x
   x = 38,312,581,696/90,578
6. Step 6: Final answer
   x = 422,978.89