Finding the Third Proportional to 5,239.69 and 8,664.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,239.69 : 8,664.47 = 8,664.47 : x
2. Step 2: Convert to fraction form
   5,239.69/8,664.47 = 8,664.47/x
3. Step 3: Cross multiply
   5,239.69x = 8,664.47 × 8,664.47
4. Step 4: Simplify right side
   5,239.69x = 75,073,018.72
5. Step 5: Solve for x
   x = 75,073,018.72/5,239.69
6. Step 6: Final answer
   x = 14,327.77