Finding the Third Proportional to 21,180 and 30,912

Step by Step Solution

1. Step 1: Write the proportion equation
   21,180 : 30,912 = 30,912 : x
2. Step 2: Convert to fraction form
   21,180/30,912 = 30,912/x
3. Step 3: Cross multiply
   21,180x = 30,912 × 30,912
4. Step 4: Simplify right side
   21,180x = 955,551,744
5. Step 5: Solve for x
   x = 955,551,744/21,180
6. Step 6: Final answer
   x = 45,115.76