Finding the Fourth Proportional to 2,291.63, 3,162.47 and 1,243.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.63 : 3,162.47 = 1,243.71 : x
2. Step 2: Convert to fraction form
   2,291.63/3,162.47 = 1,243.71/x
3. Step 3: Cross multiply
   2,291.63x = 3,162.47 × 1,243.71
4. Step 4: Simplify right side
   2,291.63x = 3,933,189.35
5. Step 5: Solve for x
   x = 3,933,189.35/2,291.63
6. Step 6: Final answer
   x = 1,716.33