Finding the Fourth Proportional to 2,106.77, 3,156.65 and 1,282.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.77 : 3,156.65 = 1,282.55 : x
2. Step 2: Convert to fraction form
   2,106.77/3,156.65 = 1,282.55/x
3. Step 3: Cross multiply
   2,106.77x = 3,156.65 × 1,282.55
4. Step 4: Simplify right side
   2,106.77x = 4,048,555.04
5. Step 5: Solve for x
   x = 4,048,555.04/2,106.77
6. Step 6: Final answer
   x = 1,921.69