Finding the Third Proportional to 4,408.17 and 9,499.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,408.17 : 9,499.78 = 9,499.78 : x
2. Step 2: Convert to fraction form
   4,408.17/9,499.78 = 9,499.78/x
3. Step 3: Cross multiply
   4,408.17x = 9,499.78 × 9,499.78
4. Step 4: Simplify right side
   4,408.17x = 90,245,843.80
5. Step 5: Solve for x
   x = 90,245,843.80/4,408.17
6. Step 6: Final answer
   x = 20,472.40