Finding the Fourth Proportional to 11,199.34, 15,452.43 and 9,413.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,199.34 : 15,452.43 = 9,413.59 : x
2. Step 2: Convert to fraction form
   11,199.34/15,452.43 = 9,413.59/x
3. Step 3: Cross multiply
   11,199.34x = 15,452.43 × 9,413.59
4. Step 4: Simplify right side
   11,199.34x = 145,462,840.52
5. Step 5: Solve for x
   x = 145,462,840.52/11,199.34
6. Step 6: Final answer
   x = 12,988.52