Finding the Fourth Proportional to 2,280.78, 3,147.13 and 1,336.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.78 : 3,147.13 = 1,336.42 : x
2. Step 2: Convert to fraction form
   2,280.78/3,147.13 = 1,336.42/x
3. Step 3: Cross multiply
   2,280.78x = 3,147.13 × 1,336.42
4. Step 4: Simplify right side
   2,280.78x = 4,205,887.47
5. Step 5: Solve for x
   x = 4,205,887.47/2,280.78
6. Step 6: Final answer
   x = 1,844.06