Finding the Fourth Proportional to 1,443.05, 1,991.34 and 884.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.05 : 1,991.34 = 884.46 : x
2. Step 2: Convert to fraction form
   1,443.05/1,991.34 = 884.46/x
3. Step 3: Cross multiply
   1,443.05x = 1,991.34 × 884.46
4. Step 4: Simplify right side
   1,443.05x = 1,761,260.58
5. Step 5: Solve for x
   x = 1,761,260.58/1,443.05
6. Step 6: Final answer
   x = 1,220.52