Finding the Fourth Proportional to 16,831.89, 25,248.20 and 5,145.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,831.89 : 25,248.20 = 5,145.12 : x
2. Step 2: Convert to fraction form
   16,831.89/25,248.20 = 5,145.12/x
3. Step 3: Cross multiply
   16,831.89x = 25,248.20 × 5,145.12
4. Step 4: Simplify right side
   16,831.89x = 129,904,993.06
5. Step 5: Solve for x
   x = 129,904,993.06/16,831.89
6. Step 6: Final answer
   x = 7,717.79