Finding the Fourth Proportional to 16,708.50, 23,057.72 and 9,155.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,708.50 : 23,057.72 = 9,155.31 : x
2. Step 2: Convert to fraction form
   16,708.50/23,057.72 = 9,155.31/x
3. Step 3: Cross multiply
   16,708.50x = 23,057.72 × 9,155.31
4. Step 4: Simplify right side
   16,708.50x = 211,100,413.43
5. Step 5: Solve for x
   x = 211,100,413.43/16,708.50
6. Step 6: Final answer
   x = 12,634.32