Finding the Fourth Proportional to 9,719.96, 13,413.63 and 5,528.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.96 : 13,413.63 = 5,528.21 : x
2. Step 2: Convert to fraction form
   9,719.96/13,413.63 = 5,528.21/x
3. Step 3: Cross multiply
   9,719.96x = 13,413.63 × 5,528.21
4. Step 4: Simplify right side
   9,719.96x = 74,153,296.43
5. Step 5: Solve for x
   x = 74,153,296.43/9,719.96
6. Step 6: Final answer
   x = 7,628.98