Finding the Third Proportional to 10,648.50 and 21,980

Step by Step Solution

1. Step 1: Write the proportion equation
   10,648.50 : 21,980 = 21,980 : x
2. Step 2: Convert to fraction form
   10,648.50/21,980 = 21,980/x
3. Step 3: Cross multiply
   10,648.50x = 21,980 × 21,980
4. Step 4: Simplify right side
   10,648.50x = 483,120,400
5. Step 5: Solve for x
   x = 483,120,400/10,648.50
6. Step 6: Final answer
   x = 45,369.81