Finding the Fourth Proportional to 3,613.61, 5,413.10 and 1,878.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,613.61 : 5,413.10 = 1,878.59 : x
2. Step 2: Convert to fraction form
   3,613.61/5,413.10 = 1,878.59/x
3. Step 3: Cross multiply
   3,613.61x = 5,413.10 × 1,878.59
4. Step 4: Simplify right side
   3,613.61x = 10,168,959.07
5. Step 5: Solve for x
   x = 10,168,959.07/3,613.61
6. Step 6: Final answer
   x = 2,814.08