Finding the Fourth Proportional to 2,105.72, 3,157.68 and 1,065.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.72 : 3,157.68 = 1,065.08 : x
2. Step 2: Convert to fraction form
   2,105.72/3,157.68 = 1,065.08/x
3. Step 3: Cross multiply
   2,105.72x = 3,157.68 × 1,065.08
4. Step 4: Simplify right side
   2,105.72x = 3,363,181.81
5. Step 5: Solve for x
   x = 3,363,181.81/2,105.72
6. Step 6: Final answer
   x = 1,597.16