Finding the Fourth Proportional to 2,291.82, 3,162.70 and 1,243.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.82 : 3,162.70 = 1,243.88 : x
2. Step 2: Convert to fraction form
   2,291.82/3,162.70 = 1,243.88/x
3. Step 3: Cross multiply
   2,291.82x = 3,162.70 × 1,243.88
4. Step 4: Simplify right side
   2,291.82x = 3,934,019.28
5. Step 5: Solve for x
   x = 3,934,019.28/2,291.82
6. Step 6: Final answer
   x = 1,716.55