Finding the Fourth Proportional to 1,443.29, 1,991.79 and 883.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.29 : 1,991.79 = 883.58 : x
2. Step 2: Convert to fraction form
   1,443.29/1,991.79 = 883.58/x
3. Step 3: Cross multiply
   1,443.29x = 1,991.79 × 883.58
4. Step 4: Simplify right side
   1,443.29x = 1,759,895.85
5. Step 5: Solve for x
   x = 1,759,895.85/1,443.29
6. Step 6: Final answer
   x = 1,219.37