Finding the Fourth Proportional to 3,413.67, 5,120.55 and 948.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.67 : 5,120.55 = 948.45 : x
2. Step 2: Convert to fraction form
   3,413.67/5,120.55 = 948.45/x
3. Step 3: Cross multiply
   3,413.67x = 5,120.55 × 948.45
4. Step 4: Simplify right side
   3,413.67x = 4,856,585.65
5. Step 5: Solve for x
   x = 4,856,585.65/3,413.67
6. Step 6: Final answer
   x = 1,422.69