Finding the Fourth Proportional to 2,280.64, 3,147.15 and 1,285.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.64 : 3,147.15 = 1,285.93 : x
2. Step 2: Convert to fraction form
   2,280.64/3,147.15 = 1,285.93/x
3. Step 3: Cross multiply
   2,280.64x = 3,147.15 × 1,285.93
4. Step 4: Simplify right side
   2,280.64x = 4,047,014.60
5. Step 5: Solve for x
   x = 4,047,014.60/2,280.64
6. Step 6: Final answer
   x = 1,774.51