Finding the Fourth Proportional to 2,287.05, 3,155.96 and 1,292.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.05 : 3,155.96 = 1,292.42 : x
2. Step 2: Convert to fraction form
   2,287.05/3,155.96 = 1,292.42/x
3. Step 3: Cross multiply
   2,287.05x = 3,155.96 × 1,292.42
4. Step 4: Simplify right side
   2,287.05x = 4,078,819.36
5. Step 5: Solve for x
   x = 4,078,819.36/2,287.05
6. Step 6: Final answer
   x = 1,783.44