Finding the Third Proportional to 3,976.50 and 8,499.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.50 : 8,499.75 = 8,499.75 : x
2. Step 2: Convert to fraction form
   3,976.50/8,499.75 = 8,499.75/x
3. Step 3: Cross multiply
   3,976.50x = 8,499.75 × 8,499.75
4. Step 4: Simplify right side
   3,976.50x = 72,245,750.06
5. Step 5: Solve for x
   x = 72,245,750.06/3,976.50
6. Step 6: Final answer
   x = 18,168.18