Finding the Fourth Proportional to 11,413.56, 17,128.98 and 8,343.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,413.56 : 17,128.98 = 8,343.48 : x
2. Step 2: Convert to fraction form
   11,413.56/17,128.98 = 8,343.48/x
3. Step 3: Cross multiply
   11,413.56x = 17,128.98 × 8,343.48
4. Step 4: Simplify right side
   11,413.56x = 142,915,302.05
5. Step 5: Solve for x
   x = 142,915,302.05/11,413.56
6. Step 6: Final answer
   x = 12,521.54