Finding the Fourth Proportional to 3,612.43, 5,413.86 and 1,857.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.43 : 5,413.86 = 1,857.36 : x
2. Step 2: Convert to fraction form
   3,612.43/5,413.86 = 1,857.36/x
3. Step 3: Cross multiply
   3,612.43x = 5,413.86 × 1,857.36
4. Step 4: Simplify right side
   3,612.43x = 10,055,487.01
5. Step 5: Solve for x
   x = 10,055,487.01/3,612.43
6. Step 6: Final answer
   x = 2,783.58