Finding the Fourth Proportional to 10,831.15, 16,261.76 and 7,156.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,831.15 : 16,261.76 = 7,156.99 : x
2. Step 2: Convert to fraction form
   10,831.15/16,261.76 = 7,156.99/x
3. Step 3: Cross multiply
   10,831.15x = 16,261.76 × 7,156.99
4. Step 4: Simplify right side
   10,831.15x = 116,385,291.92
5. Step 5: Solve for x
   x = 116,385,291.92/10,831.15
6. Step 6: Final answer
   x = 10,745.42