Finding the Fourth Proportional to 2,280.76, 3,147.57 and 1,286.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.76 : 3,147.57 = 1,286.08 : x
2. Step 2: Convert to fraction form
   2,280.76/3,147.57 = 1,286.08/x
3. Step 3: Cross multiply
   2,280.76x = 3,147.57 × 1,286.08
4. Step 4: Simplify right side
   2,280.76x = 4,048,026.83
5. Step 5: Solve for x
   x = 4,048,026.83/2,280.76
6. Step 6: Final answer
   x = 1,774.86