Finding the Fourth Proportional to 12,831.99, 17,707.95 and 7,166.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.99 : 17,707.95 = 7,166.83 : x
2. Step 2: Convert to fraction form
   12,831.99/17,707.95 = 7,166.83/x
3. Step 3: Cross multiply
   12,831.99x = 17,707.95 × 7,166.83
4. Step 4: Simplify right side
   12,831.99x = 126,909,856.23
5. Step 5: Solve for x
   x = 126,909,856.23/12,831.99
6. Step 6: Final answer
   x = 9,890.12