Finding the Third Proportional to 13,645.69 and 21,699

Step by Step Solution

1. Step 1: Write the proportion equation
   13,645.69 : 21,699 = 21,699 : x
2. Step 2: Convert to fraction form
   13,645.69/21,699 = 21,699/x
3. Step 3: Cross multiply
   13,645.69x = 21,699 × 21,699
4. Step 4: Simplify right side
   13,645.69x = 470,846,601
5. Step 5: Solve for x
   x = 470,846,601/13,645.69
6. Step 6: Final answer
   x = 34,505.16