Finding the Fourth Proportional to 1,012.83, 1,519.01 and 282.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.83 : 1,519.01 = 282.47 : x
2. Step 2: Convert to fraction form
   1,012.83/1,519.01 = 282.47/x
3. Step 3: Cross multiply
   1,012.83x = 1,519.01 × 282.47
4. Step 4: Simplify right side
   1,012.83x = 429,066.81
5. Step 5: Solve for x
   x = 429,066.81/1,012.83
6. Step 6: Final answer
   x = 423.63