Finding the Fourth Proportional to 11,311.93, 16,969.31 and 3,413.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,311.93 : 16,969.31 = 3,413.21 : x
2. Step 2: Convert to fraction form
   11,311.93/16,969.31 = 3,413.21/x
3. Step 3: Cross multiply
   11,311.93x = 16,969.31 × 3,413.21
4. Step 4: Simplify right side
   11,311.93x = 57,919,818.59
5. Step 5: Solve for x
   x = 57,919,818.59/11,311.93
6. Step 6: Final answer
   x = 5,120.24