Finding the Fourth Proportional to 2,282.73, 3,150.12 and 1,287.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,282.73 : 3,150.12 = 1,287.90 : x
2. Step 2: Convert to fraction form
   2,282.73/3,150.12 = 1,287.90/x
3. Step 3: Cross multiply
   2,282.73x = 3,150.12 × 1,287.90
4. Step 4: Simplify right side
   2,282.73x = 4,057,039.55
5. Step 5: Solve for x
   x = 4,057,039.55/2,282.73
6. Step 6: Final answer
   x = 1,777.28