Finding the Fourth Proportional to 3,679.82, 5,078.03 and 2,086.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,679.82 : 5,078.03 = 2,086.61 : x
2. Step 2: Convert to fraction form
   3,679.82/5,078.03 = 2,086.61/x
3. Step 3: Cross multiply
   3,679.82x = 5,078.03 × 2,086.61
4. Step 4: Simplify right side
   3,679.82x = 10,595,886.09
5. Step 5: Solve for x
   x = 10,595,886.09/3,679.82
6. Step 6: Final answer
   x = 2,879.46