Finding the Fourth Proportional to 3,413.48, 5,120.31 and 948.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.48 : 5,120.31 = 948.47 : x
2. Step 2: Convert to fraction form
   3,413.48/5,120.31 = 948.47/x
3. Step 3: Cross multiply
   3,413.48x = 5,120.31 × 948.47
4. Step 4: Simplify right side
   3,413.48x = 4,856,434.82
5. Step 5: Solve for x
   x = 4,856,434.82/3,413.48
6. Step 6: Final answer
   x = 1,422.72