Finding the Fourth Proportional to 1,012.28, 1,518.89 and 395.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.28 : 1,518.89 = 395.82 : x
2. Step 2: Convert to fraction form
   1,012.28/1,518.89 = 395.82/x
3. Step 3: Cross multiply
   1,012.28x = 1,518.89 × 395.82
4. Step 4: Simplify right side
   1,012.28x = 601,205.06
5. Step 5: Solve for x
   x = 601,205.06/1,012.28
6. Step 6: Final answer
   x = 593.91