Finding the Fourth Proportional to 1,443.78, 1,993.26 and 1,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.78 : 1,993.26 = 1,111.56 : x
2. Step 2: Convert to fraction form
   1,443.78/1,993.26 = 1,111.56/x
3. Step 3: Cross multiply
   1,443.78x = 1,993.26 × 1,111.56
4. Step 4: Simplify right side
   1,443.78x = 2,215,628.09
5. Step 5: Solve for x
   x = 2,215,628.09/1,443.78
6. Step 6: Final answer
   x = 1,534.60