Finding the Third Proportional to 3,421.69 and 5,185.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.69 : 5,185.69 = 5,185.69 : x
2. Step 2: Convert to fraction form
   3,421.69/5,185.69 = 5,185.69/x
3. Step 3: Cross multiply
   3,421.69x = 5,185.69 × 5,185.69
4. Step 4: Simplify right side
   3,421.69x = 26,891,354.85
5. Step 5: Solve for x
   x = 26,891,354.85/3,421.69
6. Step 6: Final answer
   x = 7,859.09