Finding the Fourth Proportional to 5,413.56, 7,470.72 and 3,145.35

Step by Step Solution

1. Step 1: Write the proportion equation
   5,413.56 : 7,470.72 = 3,145.35 : x
2. Step 2: Convert to fraction form
   5,413.56/7,470.72 = 3,145.35/x
3. Step 3: Cross multiply
   5,413.56x = 7,470.72 × 3,145.35
4. Step 4: Simplify right side
   5,413.56x = 23,498,029.15
5. Step 5: Solve for x
   x = 23,498,029.15/5,413.56
6. Step 6: Final answer
   x = 4,340.59