Finding the Third Proportional to 3,645 and 7,831.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645 : 7,831.69 = 7,831.69 : x
2. Step 2: Convert to fraction form
   3,645/7,831.69 = 7,831.69/x
3. Step 3: Cross multiply
   3,645x = 7,831.69 × 7,831.69
4. Step 4: Simplify right side
   3,645x = 61,335,329.10
5. Step 5: Solve for x
   x = 61,335,329.10/3,645
6. Step 6: Final answer
   x = 16,827.25