Finding the Fourth Proportional to 12,940.30, 19,413.15 and 4,176.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.30 : 19,413.15 = 4,176.10 : x
2. Step 2: Convert to fraction form
   12,940.30/19,413.15 = 4,176.10/x
3. Step 3: Cross multiply
   12,940.30x = 19,413.15 × 4,176.10
4. Step 4: Simplify right side
   12,940.30x = 81,071,255.72
5. Step 5: Solve for x
   x = 81,071,255.72/12,940.30
6. Step 6: Final answer
   x = 6,265.02