Finding the Fourth Proportional to 2,288.43, 3,158.01 and 1,280.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.43 : 3,158.01 = 1,280.13 : x
2. Step 2: Convert to fraction form
   2,288.43/3,158.01 = 1,280.13/x
3. Step 3: Cross multiply
   2,288.43x = 3,158.01 × 1,280.13
4. Step 4: Simplify right side
   2,288.43x = 4,042,656.30
5. Step 5: Solve for x
   x = 4,042,656.30/2,288.43
6. Step 6: Final answer
   x = 1,766.56