Finding the Fourth Proportional to 2,413.22, 3,620.55 and 1,386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,413.22 : 3,620.55 = 1,386.50 : x
2. Step 2: Convert to fraction form
   2,413.22/3,620.55 = 1,386.50/x
3. Step 3: Cross multiply
   2,413.22x = 3,620.55 × 1,386.50
4. Step 4: Simplify right side
   2,413.22x = 5,019,892.58
5. Step 5: Solve for x
   x = 5,019,892.58/2,413.22
6. Step 6: Final answer
   x = 2,080.16