Finding the Fourth Proportional to 2,287.27, 3,156.40 and 1,292.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.27 : 3,156.40 = 1,292.76 : x
2. Step 2: Convert to fraction form
   2,287.27/3,156.40 = 1,292.76/x
3. Step 3: Cross multiply
   2,287.27x = 3,156.40 × 1,292.76
4. Step 4: Simplify right side
   2,287.27x = 4,080,469.28
5. Step 5: Solve for x
   x = 4,080,469.28/2,287.27
6. Step 6: Final answer
   x = 1,783.99