Finding the Fourth Proportional to 2,413.83, 3,620.68 and 770.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,413.83 : 3,620.68 = 770.34 : x
2. Step 2: Convert to fraction form
   2,413.83/3,620.68 = 770.34/x
3. Step 3: Cross multiply
   2,413.83x = 3,620.68 × 770.34
4. Step 4: Simplify right side
   2,413.83x = 2,789,154.63
5. Step 5: Solve for x
   x = 2,789,154.63/2,413.83
6. Step 6: Final answer
   x = 1,155.49