Finding the Fourth Proportional to 1,012.12, 1,518.34 and 362.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.12 : 1,518.34 = 362.72 : x
2. Step 2: Convert to fraction form
   1,012.12/1,518.34 = 362.72/x
3. Step 3: Cross multiply
   1,012.12x = 1,518.34 × 362.72
4. Step 4: Simplify right side
   1,012.12x = 550,732.28
5. Step 5: Solve for x
   x = 550,732.28/1,012.12
6. Step 6: Final answer
   x = 544.14