Finding the Fourth Proportional to 2,288.75, 3,158.34 and 1,280.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.75 : 3,158.34 = 1,280.27 : x
2. Step 2: Convert to fraction form
   2,288.75/3,158.34 = 1,280.27/x
3. Step 3: Cross multiply
   2,288.75x = 3,158.34 × 1,280.27
4. Step 4: Simplify right side
   2,288.75x = 4,043,527.95
5. Step 5: Solve for x
   x = 4,043,527.95/2,288.75
6. Step 6: Final answer
   x = 1,766.70