Finding the Fourth Proportional to 2,413.56, 3,620.61 and 769.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,413.56 : 3,620.61 = 769.73 : x
2. Step 2: Convert to fraction form
   2,413.56/3,620.61 = 769.73/x
3. Step 3: Cross multiply
   2,413.56x = 3,620.61 × 769.73
4. Step 4: Simplify right side
   2,413.56x = 2,786,892.14
5. Step 5: Solve for x
   x = 2,786,892.14/2,413.56
6. Step 6: Final answer
   x = 1,154.68