Finding the Fourth Proportional to 3,986.82, 5,976.72 and 2,138.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.82 : 5,976.72 = 2,138.94 : x
2. Step 2: Convert to fraction form
   3,986.82/5,976.72 = 2,138.94/x
3. Step 3: Cross multiply
   3,986.82x = 5,976.72 × 2,138.94
4. Step 4: Simplify right side
   3,986.82x = 12,783,845.48
5. Step 5: Solve for x
   x = 12,783,845.48/3,986.82
6. Step 6: Final answer
   x = 3,206.53