Finding the Fourth Proportional to 1,012.67, 1,518.79 and 282.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.67 : 1,518.79 = 282.05 : x
2. Step 2: Convert to fraction form
   1,012.67/1,518.79 = 282.05/x
3. Step 3: Cross multiply
   1,012.67x = 1,518.79 × 282.05
4. Step 4: Simplify right side
   1,012.67x = 428,374.72
5. Step 5: Solve for x
   x = 428,374.72/1,012.67
6. Step 6: Final answer
   x = 423.02