Finding the Fourth Proportional to 2,291.69, 3,162.54 and 1,243.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.69 : 3,162.54 = 1,243.76 : x
2. Step 2: Convert to fraction form
   2,291.69/3,162.54 = 1,243.76/x
3. Step 3: Cross multiply
   2,291.69x = 3,162.54 × 1,243.76
4. Step 4: Simplify right side
   2,291.69x = 3,933,424.94
5. Step 5: Solve for x
   x = 3,933,424.94/2,291.69
6. Step 6: Final answer
   x = 1,716.39