Finding the Third Proportional to 20,142 and 30,912

Step by Step Solution

1. Step 1: Write the proportion equation
   20,142 : 30,912 = 30,912 : x
2. Step 2: Convert to fraction form
   20,142/30,912 = 30,912/x
3. Step 3: Cross multiply
   20,142x = 30,912 × 30,912
4. Step 4: Simplify right side
   20,142x = 955,551,744
5. Step 5: Solve for x
   x = 955,551,744/20,142
6. Step 6: Final answer
   x = 47,440.76