Finding the Third Proportional to 79,771.50 and 90,949.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,771.50 : 90,949.50 = 90,949.50 : x
2. Step 2: Convert to fraction form
   79,771.50/90,949.50 = 90,949.50/x
3. Step 3: Cross multiply
   79,771.50x = 90,949.50 × 90,949.50
4. Step 4: Simplify right side
   79,771.50x = 8,271,811,550.25
5. Step 5: Solve for x
   x = 8,271,811,550.25/79,771.50
6. Step 6: Final answer
   x = 103,693.82