Finding the Fourth Proportional to 2,281.42, 3,148.57 and 1,286.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,281.42 : 3,148.57 = 1,286.78 : x
2. Step 2: Convert to fraction form
   2,281.42/3,148.57 = 1,286.78/x
3. Step 3: Cross multiply
   2,281.42x = 3,148.57 × 1,286.78
4. Step 4: Simplify right side
   2,281.42x = 4,051,516.90
5. Step 5: Solve for x
   x = 4,051,516.90/2,281.42
6. Step 6: Final answer
   x = 1,775.88