Finding the Fourth Proportional to 2,280.63, 3,147.72 and 1,285.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.63 : 3,147.72 = 1,285.92 : x
2. Step 2: Convert to fraction form
   2,280.63/3,147.72 = 1,285.92/x
3. Step 3: Cross multiply
   2,280.63x = 3,147.72 × 1,285.92
4. Step 4: Simplify right side
   2,280.63x = 4,047,716.10
5. Step 5: Solve for x
   x = 4,047,716.10/2,280.63
6. Step 6: Final answer
   x = 1,774.82