Finding the Fourth Proportional to 1,442.22, 1,991.33 and 883.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.22 : 1,991.33 = 883.45 : x
2. Step 2: Convert to fraction form
   1,442.22/1,991.33 = 883.45/x
3. Step 3: Cross multiply
   1,442.22x = 1,991.33 × 883.45
4. Step 4: Simplify right side
   1,442.22x = 1,759,241.87
5. Step 5: Solve for x
   x = 1,759,241.87/1,442.22
6. Step 6: Final answer
   x = 1,219.82