Finding the Fourth Proportional to 2,105, 3,155.06 and 1,180.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105 : 3,155.06 = 1,180.12 : x
2. Step 2: Convert to fraction form
   2,105/3,155.06 = 1,180.12/x
3. Step 3: Cross multiply
   2,105x = 3,155.06 × 1,180.12
4. Step 4: Simplify right side
   2,105x = 3,723,349.41
5. Step 5: Solve for x
   x = 3,723,349.41/2,105
6. Step 6: Final answer
   x = 1,768.81