Finding the Fourth Proportional to 3,942.15, 5,443.34 and 2,685.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.15 : 5,443.34 = 2,685.84 : x
2. Step 2: Convert to fraction form
   3,942.15/5,443.34 = 2,685.84/x
3. Step 3: Cross multiply
   3,942.15x = 5,443.34 × 2,685.84
4. Step 4: Simplify right side
   3,942.15x = 14,619,940.31
5. Step 5: Solve for x
   x = 14,619,940.31/3,942.15
6. Step 6: Final answer
   x = 3,708.62