Finding the Fourth Proportional to 1,243.49, 1,854.72 and 1,058.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.49 : 1,854.72 = 1,058.81 : x
2. Step 2: Convert to fraction form
   1,243.49/1,854.72 = 1,058.81/x
3. Step 3: Cross multiply
   1,243.49x = 1,854.72 × 1,058.81
4. Step 4: Simplify right side
   1,243.49x = 1,963,786.81
5. Step 5: Solve for x
   x = 1,963,786.81/1,243.49
6. Step 6: Final answer
   x = 1,579.26