Finding the Fourth Proportional to 2,280.85, 3,147.32 and 1,286.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.85 : 3,147.32 = 1,286.17 : x
2. Step 2: Convert to fraction form
   2,280.85/3,147.32 = 1,286.17/x
3. Step 3: Cross multiply
   2,280.85x = 3,147.32 × 1,286.17
4. Step 4: Simplify right side
   2,280.85x = 4,047,988.56
5. Step 5: Solve for x
   x = 4,047,988.56/2,280.85
6. Step 6: Final answer
   x = 1,774.77