Finding the Fourth Proportional to 1,443.10, 1,991.55 and 883.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.10 : 1,991.55 = 883.84 : x
2. Step 2: Convert to fraction form
   1,443.10/1,991.55 = 883.84/x
3. Step 3: Cross multiply
   1,443.10x = 1,991.55 × 883.84
4. Step 4: Simplify right side
   1,443.10x = 1,760,211.55
5. Step 5: Solve for x
   x = 1,760,211.55/1,443.10
6. Step 6: Final answer
   x = 1,219.74