Finding the Fourth Proportional to 16,003.60, 22,087.56 and 9,719.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,003.60 : 22,087.56 = 9,719.20 : x
2. Step 2: Convert to fraction form
   16,003.60/22,087.56 = 9,719.20/x
3. Step 3: Cross multiply
   16,003.60x = 22,087.56 × 9,719.20
4. Step 4: Simplify right side
   16,003.60x = 214,673,413.15
5. Step 5: Solve for x
   x = 214,673,413.15/16,003.60
6. Step 6: Final answer
   x = 13,414.07