Finding the Fourth Proportional to 1,488.48, 2,235.72 and 1,143.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.48 : 2,235.72 = 1,143.42 : x
2. Step 2: Convert to fraction form
   1,488.48/2,235.72 = 1,143.42/x
3. Step 3: Cross multiply
   1,488.48x = 2,235.72 × 1,143.42
4. Step 4: Simplify right side
   1,488.48x = 2,556,366.96
5. Step 5: Solve for x
   x = 2,556,366.96/1,488.48
6. Step 6: Final answer
   x = 1,717.43