Finding the Fourth Proportional to 2,291.48, 3,162.25 and 1,243.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.48 : 3,162.25 = 1,243.55 : x
2. Step 2: Convert to fraction form
   2,291.48/3,162.25 = 1,243.55/x
3. Step 3: Cross multiply
   2,291.48x = 3,162.25 × 1,243.55
4. Step 4: Simplify right side
   2,291.48x = 3,932,407.66
5. Step 5: Solve for x
   x = 3,932,407.66/2,291.48
6. Step 6: Final answer
   x = 1,716.10