Finding the Fourth Proportional to 2,413.34, 3,620.56 and 769.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,413.34 : 3,620.56 = 769.98 : x
2. Step 2: Convert to fraction form
   2,413.34/3,620.56 = 769.98/x
3. Step 3: Cross multiply
   2,413.34x = 3,620.56 × 769.98
4. Step 4: Simplify right side
   2,413.34x = 2,787,758.79
5. Step 5: Solve for x
   x = 2,787,758.79/2,413.34
6. Step 6: Final answer
   x = 1,155.15