Finding the Third Proportional to 3,921.50 and 8,456

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.50 : 8,456 = 8,456 : x
2. Step 2: Convert to fraction form
   3,921.50/8,456 = 8,456/x
3. Step 3: Cross multiply
   3,921.50x = 8,456 × 8,456
4. Step 4: Simplify right side
   3,921.50x = 71,503,936
5. Step 5: Solve for x
   x = 71,503,936/3,921.50
6. Step 6: Final answer
   x = 18,233.82