Finding the Third Proportional to 21,800 and 30,699

Step by Step Solution

1. Step 1: Write the proportion equation
   21,800 : 30,699 = 30,699 : x
2. Step 2: Convert to fraction form
   21,800/30,699 = 30,699/x
3. Step 3: Cross multiply
   21,800x = 30,699 × 30,699
4. Step 4: Simplify right side
   21,800x = 942,428,601
5. Step 5: Solve for x
   x = 942,428,601/21,800
6. Step 6: Final answer
   x = 43,230.67