Finding the Fourth Proportional to 1,443.14, 1,991.89 and 883.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.14 : 1,991.89 = 883.51 : x
2. Step 2: Convert to fraction form
   1,443.14/1,991.89 = 883.51/x
3. Step 3: Cross multiply
   1,443.14x = 1,991.89 × 883.51
4. Step 4: Simplify right side
   1,443.14x = 1,759,850.86
5. Step 5: Solve for x
   x = 1,759,850.86/1,443.14
6. Step 6: Final answer
   x = 1,219.46