Finding the Fourth Proportional to 2,286.90, 3,155.72 and 1,292.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.90 : 3,155.72 = 1,292.27 : x
2. Step 2: Convert to fraction form
   2,286.90/3,155.72 = 1,292.27/x
3. Step 3: Cross multiply
   2,286.90x = 3,155.72 × 1,292.27
4. Step 4: Simplify right side
   2,286.90x = 4,078,020.04
5. Step 5: Solve for x
   x = 4,078,020.04/2,286.90
6. Step 6: Final answer
   x = 1,783.21