Finding the Third Proportional to 10,728 and 18,090

Step by Step Solution

1. Step 1: Write the proportion equation
   10,728 : 18,090 = 18,090 : x
2. Step 2: Convert to fraction form
   10,728/18,090 = 18,090/x
3. Step 3: Cross multiply
   10,728x = 18,090 × 18,090
4. Step 4: Simplify right side
   10,728x = 327,248,100
5. Step 5: Solve for x
   x = 327,248,100/10,728
6. Step 6: Final answer
   x = 30,504.11