Finding the Fourth Proportional to 3,413.58, 4,709.31 and 2,086.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.58 : 4,709.31 = 2,086.86 : x
2. Step 2: Convert to fraction form
   3,413.58/4,709.31 = 2,086.86/x
3. Step 3: Cross multiply
   3,413.58x = 4,709.31 × 2,086.86
4. Step 4: Simplify right side
   3,413.58x = 9,827,670.67
5. Step 5: Solve for x
   x = 9,827,670.67/3,413.58
6. Step 6: Final answer
   x = 2,878.99