Finding the Fourth Proportional to 2,291.51, 3,162.26 and 1,243.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.51 : 3,162.26 = 1,243.58 : x
2. Step 2: Convert to fraction form
   2,291.51/3,162.26 = 1,243.58/x
3. Step 3: Cross multiply
   2,291.51x = 3,162.26 × 1,243.58
4. Step 4: Simplify right side
   2,291.51x = 3,932,510.59
5. Step 5: Solve for x
   x = 3,932,510.59/2,291.51
6. Step 6: Final answer
   x = 1,716.12