Finding the Fourth Proportional to 1,012.49, 1,518.71 and 282.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.49 : 1,518.71 = 282.03 : x
2. Step 2: Convert to fraction form
   1,012.49/1,518.71 = 282.03/x
3. Step 3: Cross multiply
   1,012.49x = 1,518.71 × 282.03
4. Step 4: Simplify right side
   1,012.49x = 428,321.78
5. Step 5: Solve for x
   x = 428,321.78/1,012.49
6. Step 6: Final answer
   x = 423.04