Finding the Fourth Proportional to 2,280.15, 3,146.76 and 1,285.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.15 : 3,146.76 = 1,285.47 : x
2. Step 2: Convert to fraction form
   2,280.15/3,146.76 = 1,285.47/x
3. Step 3: Cross multiply
   2,280.15x = 3,146.76 × 1,285.47
4. Step 4: Simplify right side
   2,280.15x = 4,045,065.58
5. Step 5: Solve for x
   x = 4,045,065.58/2,280.15
6. Step 6: Final answer
   x = 1,774.03