Finding the Fourth Proportional to 9,391.30, 12,961.46 and 5,413.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.30 : 12,961.46 = 5,413.68 : x
2. Step 2: Convert to fraction form
   9,391.30/12,961.46 = 5,413.68/x
3. Step 3: Cross multiply
   9,391.30x = 12,961.46 × 5,413.68
4. Step 4: Simplify right side
   9,391.30x = 70,169,210.31
5. Step 5: Solve for x
   x = 70,169,210.31/9,391.30
6. Step 6: Final answer
   x = 7,471.73