Finding the Fourth Proportional to 16,708.78, 23,059.49 and 9,540.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,708.78 : 23,059.49 = 9,540.89 : x
2. Step 2: Convert to fraction form
   16,708.78/23,059.49 = 9,540.89/x
3. Step 3: Cross multiply
   16,708.78x = 23,059.49 × 9,540.89
4. Step 4: Simplify right side
   16,708.78x = 220,007,981.02
5. Step 5: Solve for x
   x = 220,007,981.02/16,708.78
6. Step 6: Final answer
   x = 13,167.21