Finding the Third Proportional to 3,321 and 7,831.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,321 : 7,831.69 = 7,831.69 : x
2. Step 2: Convert to fraction form
   3,321/7,831.69 = 7,831.69/x
3. Step 3: Cross multiply
   3,321x = 7,831.69 × 7,831.69
4. Step 4: Simplify right side
   3,321x = 61,335,329.10
5. Step 5: Solve for x
   x = 61,335,329.10/3,321
6. Step 6: Final answer
   x = 18,468.93