Finding the Fourth Proportional to 5,901.09, 8,148.42 and 3,920.49

Step by Step Solution

1. Step 1: Write the proportion equation
   5,901.09 : 8,148.42 = 3,920.49 : x
2. Step 2: Convert to fraction form
   5,901.09/8,148.42 = 3,920.49/x
3. Step 3: Cross multiply
   5,901.09x = 8,148.42 × 3,920.49
4. Step 4: Simplify right side
   5,901.09x = 31,945,799.13
5. Step 5: Solve for x
   x = 31,945,799.13/5,901.09
6. Step 6: Final answer
   x = 5,413.55