Finding the Fourth Proportional to 1,012.52, 1,518.50 and 282.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.52 : 1,518.50 = 282.14 : x
2. Step 2: Convert to fraction form
   1,012.52/1,518.50 = 282.14/x
3. Step 3: Cross multiply
   1,012.52x = 1,518.50 × 282.14
4. Step 4: Simplify right side
   1,012.52x = 428,420.59
5. Step 5: Solve for x
   x = 428,420.59/1,012.52
6. Step 6: Final answer
   x = 423.13