Finding the Third Proportional to 21,122 and 30,915

Step by Step Solution

1. Step 1: Write the proportion equation
   21,122 : 30,915 = 30,915 : x
2. Step 2: Convert to fraction form
   21,122/30,915 = 30,915/x
3. Step 3: Cross multiply
   21,122x = 30,915 × 30,915
4. Step 4: Simplify right side
   21,122x = 955,737,225
5. Step 5: Solve for x
   x = 955,737,225/21,122
6. Step 6: Final answer
   x = 45,248.42