Finding the Fourth Proportional to 2,108, 3,160.56 and 1,286.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108 : 3,160.56 = 1,286.56 : x
2. Step 2: Convert to fraction form
   2,108/3,160.56 = 1,286.56/x
3. Step 3: Cross multiply
   2,108x = 3,160.56 × 1,286.56
4. Step 4: Simplify right side
   2,108x = 4,066,250.07
5. Step 5: Solve for x
   x = 4,066,250.07/2,108
6. Step 6: Final answer
   x = 1,928.96