Finding the Fourth Proportional to 1,983.16, 2,736.10 and 1,143.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.16 : 2,736.10 = 1,143.57 : x
2. Step 2: Convert to fraction form
   1,983.16/2,736.10 = 1,143.57/x
3. Step 3: Cross multiply
   1,983.16x = 2,736.10 × 1,143.57
4. Step 4: Simplify right side
   1,983.16x = 3,128,921.88
5. Step 5: Solve for x
   x = 3,128,921.88/1,983.16
6. Step 6: Final answer
   x = 1,577.75