Finding the Fourth Proportional to 2,281.31, 3,147.91 and 1,286.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,281.31 : 3,147.91 = 1,286.69 : x
2. Step 2: Convert to fraction form
   2,281.31/3,147.91 = 1,286.69/x
3. Step 3: Cross multiply
   2,281.31x = 3,147.91 × 1,286.69
4. Step 4: Simplify right side
   2,281.31x = 4,050,372.60
5. Step 5: Solve for x
   x = 4,050,372.60/2,281.31
6. Step 6: Final answer
   x = 1,775.46