Finding the Fourth Proportional to 9,413.59, 12,991.16 and 5,636.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.59 : 12,991.16 = 5,636.03 : x
2. Step 2: Convert to fraction form
   9,413.59/12,991.16 = 5,636.03/x
3. Step 3: Cross multiply
   9,413.59x = 12,991.16 × 5,636.03
4. Step 4: Simplify right side
   9,413.59x = 73,218,567.49
5. Step 5: Solve for x
   x = 73,218,567.49/9,413.59
6. Step 6: Final answer
   x = 7,777.96