Finding the Fourth Proportional to 3,986.84, 5,500.72 and 3,144.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.84 : 5,500.72 = 3,144.96 : x
2. Step 2: Convert to fraction form
   3,986.84/5,500.72 = 3,144.96/x
3. Step 3: Cross multiply
   3,986.84x = 5,500.72 × 3,144.96
4. Step 4: Simplify right side
   3,986.84x = 17,299,544.37
5. Step 5: Solve for x
   x = 17,299,544.37/3,986.84
6. Step 6: Final answer
   x = 4,339.16