Finding the Fourth Proportional to 2,280, 3,146.22 and 1,284.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280 : 3,146.22 = 1,284.96 : x
2. Step 2: Convert to fraction form
   2,280/3,146.22 = 1,284.96/x
3. Step 3: Cross multiply
   2,280x = 3,146.22 × 1,284.96
4. Step 4: Simplify right side
   2,280x = 4,042,766.85
5. Step 5: Solve for x
   x = 4,042,766.85/2,280
6. Step 6: Final answer
   x = 1,773.14