Finding the Fourth Proportional to 2,105.96, 3,157.11 and 1,065.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.96 : 3,157.11 = 1,065.09 : x
2. Step 2: Convert to fraction form
   2,105.96/3,157.11 = 1,065.09/x
3. Step 3: Cross multiply
   2,105.96x = 3,157.11 × 1,065.09
4. Step 4: Simplify right side
   2,105.96x = 3,362,606.29
5. Step 5: Solve for x
   x = 3,362,606.29/2,105.96
6. Step 6: Final answer
   x = 1,596.71