Finding the Fourth Proportional to 1,012.50, 1,518.83 and 396.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.50 : 1,518.83 = 396.15 : x
2. Step 2: Convert to fraction form
   1,012.50/1,518.83 = 396.15/x
3. Step 3: Cross multiply
   1,012.50x = 1,518.83 × 396.15
4. Step 4: Simplify right side
   1,012.50x = 601,682.52
5. Step 5: Solve for x
   x = 601,682.52/1,012.50
6. Step 6: Final answer
   x = 594.25