Finding the Fourth Proportional to 1,015.98, 1,520.18 and 724.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.98 : 1,520.18 = 724.16 : x
2. Step 2: Convert to fraction form
   1,015.98/1,520.18 = 724.16/x
3. Step 3: Cross multiply
   1,015.98x = 1,520.18 × 724.16
4. Step 4: Simplify right side
   1,015.98x = 1,100,842.33
5. Step 5: Solve for x
   x = 1,100,842.33/1,015.98
6. Step 6: Final answer
   x = 1,083.53