Finding the Fourth Proportional to 3,765.49, 5,196.32 and 2,086.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,765.49 : 5,196.32 = 2,086.90 : x
2. Step 2: Convert to fraction form
   3,765.49/5,196.32 = 2,086.90/x
3. Step 3: Cross multiply
   3,765.49x = 5,196.32 × 2,086.90
4. Step 4: Simplify right side
   3,765.49x = 10,844,184.61
5. Step 5: Solve for x
   x = 10,844,184.61/3,765.49
6. Step 6: Final answer
   x = 2,879.89