Finding the Fourth Proportional to 16,905.80, 23,328.82 and 9,831.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,905.80 : 23,328.82 = 9,831.72 : x
2. Step 2: Convert to fraction form
   16,905.80/23,328.82 = 9,831.72/x
3. Step 3: Cross multiply
   16,905.80x = 23,328.82 × 9,831.72
4. Step 4: Simplify right side
   16,905.80x = 229,362,426.17
5. Step 5: Solve for x
   x = 229,362,426.17/16,905.80
6. Step 6: Final answer
   x = 13,567.09