Finding the Fourth Proportional to 2,105.01, 3,154.03 and 1,280.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.01 : 3,154.03 = 1,280.79 : x
2. Step 2: Convert to fraction form
   2,105.01/3,154.03 = 1,280.79/x
3. Step 3: Cross multiply
   2,105.01x = 3,154.03 × 1,280.79
4. Step 4: Simplify right side
   2,105.01x = 4,039,650.08
5. Step 5: Solve for x
   x = 4,039,650.08/2,105.01
6. Step 6: Final answer
   x = 1,919.06