Finding the Fourth Proportional to 1,017.42, 1,524.90 and 728.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.42 : 1,524.90 = 728.25 : x
2. Step 2: Convert to fraction form
   1,017.42/1,524.90 = 728.25/x
3. Step 3: Cross multiply
   1,017.42x = 1,524.90 × 728.25
4. Step 4: Simplify right side
   1,017.42x = 1,110,508.43
5. Step 5: Solve for x
   x = 1,110,508.43/1,017.42
6. Step 6: Final answer
   x = 1,091.49