Finding the Fourth Proportional to 1,443.48, 1,991.56 and 883.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.48 : 1,991.56 = 883.36 : x
2. Step 2: Convert to fraction form
   1,443.48/1,991.56 = 883.36/x
3. Step 3: Cross multiply
   1,443.48x = 1,991.56 × 883.36
4. Step 4: Simplify right side
   1,443.48x = 1,759,264.44
5. Step 5: Solve for x
   x = 1,759,264.44/1,443.48
6. Step 6: Final answer
   x = 1,218.77