Finding the Third Proportional to 3,421.69 and 7,486.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.69 : 7,486.31 = 7,486.31 : x
2. Step 2: Convert to fraction form
   3,421.69/7,486.31 = 7,486.31/x
3. Step 3: Cross multiply
   3,421.69x = 7,486.31 × 7,486.31
4. Step 4: Simplify right side
   3,421.69x = 56,044,874.85
5. Step 5: Solve for x
   x = 56,044,874.85/3,421.69
6. Step 6: Final answer
   x = 16,379.31