Finding the Fourth Proportional to 2,106.27, 3,155.90 and 1,282.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.27 : 3,155.90 = 1,282.05 : x
2. Step 2: Convert to fraction form
   2,106.27/3,155.90 = 1,282.05/x
3. Step 3: Cross multiply
   2,106.27x = 3,155.90 × 1,282.05
4. Step 4: Simplify right side
   2,106.27x = 4,046,015.18
5. Step 5: Solve for x
   x = 4,046,015.18/2,106.27
6. Step 6: Final answer
   x = 1,920.94