Finding the Fourth Proportional to 1,443.07, 1,991.30 and 883.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.07 : 1,991.30 = 883.42 : x
2. Step 2: Convert to fraction form
   1,443.07/1,991.30 = 883.42/x
3. Step 3: Cross multiply
   1,443.07x = 1,991.30 × 883.42
4. Step 4: Simplify right side
   1,443.07x = 1,759,161.02
5. Step 5: Solve for x
   x = 1,759,161.02/1,443.07
6. Step 6: Final answer
   x = 1,219.04