Finding the Fourth Proportional to 2,280.60, 3,147.57 and 1,285.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.60 : 3,147.57 = 1,285.97 : x
2. Step 2: Convert to fraction form
   2,280.60/3,147.57 = 1,285.97/x
3. Step 3: Cross multiply
   2,280.60x = 3,147.57 × 1,285.97
4. Step 4: Simplify right side
   2,280.60x = 4,047,664.86
5. Step 5: Solve for x
   x = 4,047,664.86/2,280.60
6. Step 6: Final answer
   x = 1,774.82