Finding the Fourth Proportional to 2,286.88, 3,156.35 and 1,292.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.88 : 3,156.35 = 1,292.17 : x
2. Step 2: Convert to fraction form
   2,286.88/3,156.35 = 1,292.17/x
3. Step 3: Cross multiply
   2,286.88x = 3,156.35 × 1,292.17
4. Step 4: Simplify right side
   2,286.88x = 4,078,540.78
5. Step 5: Solve for x
   x = 4,078,540.78/2,286.88
6. Step 6: Final answer
   x = 1,783.45