Finding the Third Proportional to 6,912.50 and 10,721

Step by Step Solution

1. Step 1: Write the proportion equation
   6,912.50 : 10,721 = 10,721 : x
2. Step 2: Convert to fraction form
   6,912.50/10,721 = 10,721/x
3. Step 3: Cross multiply
   6,912.50x = 10,721 × 10,721
4. Step 4: Simplify right side
   6,912.50x = 114,939,841
5. Step 5: Solve for x
   x = 114,939,841/6,912.50
6. Step 6: Final answer
   x = 16,627.83