Finding the Fourth Proportional to 1,929.30, 2,662.31 and 1,143.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,929.30 : 2,662.31 = 1,143.20 : x
2. Step 2: Convert to fraction form
   1,929.30/2,662.31 = 1,143.20/x
3. Step 3: Cross multiply
   1,929.30x = 2,662.31 × 1,143.20
4. Step 4: Simplify right side
   1,929.30x = 3,043,533.76
5. Step 5: Solve for x
   x = 3,043,533.76/1,929.30
6. Step 6: Final answer
   x = 1,577.53