Finding the Fourth Proportional to 16,790.28, 23,171.58 and 9,719.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,790.28 : 23,171.58 = 9,719.16 : x
2. Step 2: Convert to fraction form
   16,790.28/23,171.58 = 9,719.16/x
3. Step 3: Cross multiply
   16,790.28x = 23,171.58 × 9,719.16
4. Step 4: Simplify right side
   16,790.28x = 225,208,293.47
5. Step 5: Solve for x
   x = 225,208,293.47/16,790.28
6. Step 6: Final answer
   x = 13,413.02