Finding the Fourth Proportional to 3,196.90, 4,413.31 and 2,477.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.90 : 4,413.31 = 2,477.47 : x
2. Step 2: Convert to fraction form
   3,196.90/4,413.31 = 2,477.47/x
3. Step 3: Cross multiply
   3,196.90x = 4,413.31 × 2,477.47
4. Step 4: Simplify right side
   3,196.90x = 10,933,838.29
5. Step 5: Solve for x
   x = 10,933,838.29/3,196.90
6. Step 6: Final answer
   x = 3,420.14