Finding the Third Proportional to 3,996.38 and 8,721.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.38 : 8,721.38 = 8,721.38 : x
2. Step 2: Convert to fraction form
   3,996.38/8,721.38 = 8,721.38/x
3. Step 3: Cross multiply
   3,996.38x = 8,721.38 × 8,721.38
4. Step 4: Simplify right side
   3,996.38x = 76,062,381.89
5. Step 5: Solve for x
   x = 76,062,381.89/3,996.38
6. Step 6: Final answer
   x = 19,032.84