Finding the Fourth Proportional to 6,413.55, 8,846.85 and 3,894.38

Step by Step Solution

1. Step 1: Write the proportion equation
   6,413.55 : 8,846.85 = 3,894.38 : x
2. Step 2: Convert to fraction form
   6,413.55/8,846.85 = 3,894.38/x
3. Step 3: Cross multiply
   6,413.55x = 8,846.85 × 3,894.38
4. Step 4: Simplify right side
   6,413.55x = 34,452,999.25
5. Step 5: Solve for x
   x = 34,452,999.25/6,413.55
6. Step 6: Final answer
   x = 5,371.91