Finding the Fourth Proportional to 3,765.39, 5,196.15 and 2,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.39 : 5,196.15 = 2,086.80 : x
2. Step 2: Convert to fraction form
   3,765.39/5,196.15 = 2,086.80/x
3. Step 3: Cross multiply
   3,765.39x = 5,196.15 × 2,086.80
4. Step 4: Simplify right side
   3,765.39x = 10,843,325.82
5. Step 5: Solve for x
   x = 10,843,325.82/3,765.39
6. Step 6: Final answer
   x = 2,879.74