Finding the Fourth Proportional to 1,982.81, 2,736.52 and 1,143.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,982.81 : 2,736.52 = 1,143.72 : x
2. Step 2: Convert to fraction form
   1,982.81/2,736.52 = 1,143.72/x
3. Step 3: Cross multiply
   1,982.81x = 2,736.52 × 1,143.72
4. Step 4: Simplify right side
   1,982.81x = 3,129,809.80
5. Step 5: Solve for x
   x = 3,129,809.80/1,982.81
6. Step 6: Final answer
   x = 1,578.47