Finding the Third Proportional to 5,488 and 10,699

Step by Step Solution

1. Step 1: Write the proportion equation
   5,488 : 10,699 = 10,699 : x
2. Step 2: Convert to fraction form
   5,488/10,699 = 10,699/x
3. Step 3: Cross multiply
   5,488x = 10,699 × 10,699
4. Step 4: Simplify right side
   5,488x = 114,468,601
5. Step 5: Solve for x
   x = 114,468,601/5,488
6. Step 6: Final answer
   x = 20,857.98