Finding the Fourth Proportional to 2,413.49, 3,620.59 and 770.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,413.49 : 3,620.59 = 770.51 : x
2. Step 2: Convert to fraction form
   2,413.49/3,620.59 = 770.51/x
3. Step 3: Cross multiply
   2,413.49x = 3,620.59 × 770.51
4. Step 4: Simplify right side
   2,413.49x = 2,789,707.93
5. Step 5: Solve for x
   x = 2,789,707.93/2,413.49
6. Step 6: Final answer
   x = 1,155.88