Finding the Fourth Proportional to 2,106.56, 3,155.73 and 1,282.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.56 : 3,155.73 = 1,282.79 : x
2. Step 2: Convert to fraction form
   2,106.56/3,155.73 = 1,282.79/x
3. Step 3: Cross multiply
   2,106.56x = 3,155.73 × 1,282.79
4. Step 4: Simplify right side
   2,106.56x = 4,048,138.89
5. Step 5: Solve for x
   x = 4,048,138.89/2,106.56
6. Step 6: Final answer
   x = 1,921.68