Finding the Fourth Proportional to 2,739.81, 4,105.89 and 2,072.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,739.81 : 4,105.89 = 2,072.15 : x
2. Step 2: Convert to fraction form
   2,739.81/4,105.89 = 2,072.15/x
3. Step 3: Cross multiply
   2,739.81x = 4,105.89 × 2,072.15
4. Step 4: Simplify right side
   2,739.81x = 8,508,019.96
5. Step 5: Solve for x
   x = 8,508,019.96/2,739.81
6. Step 6: Final answer
   x = 3,105.33