Finding the Fourth Proportional to 1,443.08, 1,990.52 and 883.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.08 : 1,990.52 = 883.23 : x
2. Step 2: Convert to fraction form
   1,443.08/1,990.52 = 883.23/x
3. Step 3: Cross multiply
   1,443.08x = 1,990.52 × 883.23
4. Step 4: Simplify right side
   1,443.08x = 1,758,082.56
5. Step 5: Solve for x
   x = 1,758,082.56/1,443.08
6. Step 6: Final answer
   x = 1,218.29