Finding the Fourth Proportional to 3,936.24, 5,902.61 and 2,086.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.24 : 5,902.61 = 2,086.92 : x
2. Step 2: Convert to fraction form
   3,936.24/5,902.61 = 2,086.92/x
3. Step 3: Cross multiply
   3,936.24x = 5,902.61 × 2,086.92
4. Step 4: Simplify right side
   3,936.24x = 12,318,264.43
5. Step 5: Solve for x
   x = 12,318,264.43/3,936.24
6. Step 6: Final answer
   x = 3,129.45