Finding the Fourth Proportional to 1,019.88, 1,530.72 and 674.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.88 : 1,530.72 = 674.28 : x
2. Step 2: Convert to fraction form
   1,019.88/1,530.72 = 674.28/x
3. Step 3: Cross multiply
   1,019.88x = 1,530.72 × 674.28
4. Step 4: Simplify right side
   1,019.88x = 1,032,133.88
5. Step 5: Solve for x
   x = 1,032,133.88/1,019.88
6. Step 6: Final answer
   x = 1,012.02