Finding the Fourth Proportional to 2,280.10, 3,146.10 and 1,285.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.10 : 3,146.10 = 1,285.15 : x
2. Step 2: Convert to fraction form
   2,280.10/3,146.10 = 1,285.15/x
3. Step 3: Cross multiply
   2,280.10x = 3,146.10 × 1,285.15
4. Step 4: Simplify right side
   2,280.10x = 4,043,210.42
5. Step 5: Solve for x
   x = 4,043,210.42/2,280.10
6. Step 6: Final answer
   x = 1,773.26