Finding the Third Proportional to 90,619.50 and 196,809

Step by Step Solution

1. Step 1: Write the proportion equation
   90,619.50 : 196,809 = 196,809 : x
2. Step 2: Convert to fraction form
   90,619.50/196,809 = 196,809/x
3. Step 3: Cross multiply
   90,619.50x = 196,809 × 196,809
4. Step 4: Simplify right side
   90,619.50x = 38,733,782,481
5. Step 5: Solve for x
   x = 38,733,782,481/90,619.50
6. Step 6: Final answer
   x = 427,433.20