Finding the Fourth Proportional to 2,280.39, 3,146.86 and 1,285.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.39 : 3,146.86 = 1,285.61 : x
2. Step 2: Convert to fraction form
   2,280.39/3,146.86 = 1,285.61/x
3. Step 3: Cross multiply
   2,280.39x = 3,146.86 × 1,285.61
4. Step 4: Simplify right side
   2,280.39x = 4,045,634.68
5. Step 5: Solve for x
   x = 4,045,634.68/2,280.39
6. Step 6: Final answer
   x = 1,774.10