Finding the Fourth Proportional to 3,956.12, 5,929.91 and 2,105.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,956.12 : 5,929.91 = 2,105.38 : x
2. Step 2: Convert to fraction form
   3,956.12/5,929.91 = 2,105.38/x
3. Step 3: Cross multiply
   3,956.12x = 5,929.91 × 2,105.38
4. Step 4: Simplify right side
   3,956.12x = 12,484,685.34
5. Step 5: Solve for x
   x = 12,484,685.34/3,956.12
6. Step 6: Final answer
   x = 3,155.79