Finding the Fourth Proportional to 1,929.28, 2,662.52 and 1,143.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,929.28 : 2,662.52 = 1,143.40 : x
2. Step 2: Convert to fraction form
   1,929.28/2,662.52 = 1,143.40/x
3. Step 3: Cross multiply
   1,929.28x = 2,662.52 × 1,143.40
4. Step 4: Simplify right side
   1,929.28x = 3,044,325.37
5. Step 5: Solve for x
   x = 3,044,325.37/1,929.28
6. Step 6: Final answer
   x = 1,577.96