Finding the Fourth Proportional to 2,291.63, 3,162.51 and 1,243.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.63 : 3,162.51 = 1,243.76 : x
2. Step 2: Convert to fraction form
   2,291.63/3,162.51 = 1,243.76/x
3. Step 3: Cross multiply
   2,291.63x = 3,162.51 × 1,243.76
4. Step 4: Simplify right side
   2,291.63x = 3,933,387.63
5. Step 5: Solve for x
   x = 3,933,387.63/2,291.63
6. Step 6: Final answer
   x = 1,716.42