Finding the Fourth Proportional to 1,016.62, 1,525.46 and 439.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.62 : 1,525.46 = 439.54 : x
2. Step 2: Convert to fraction form
   1,016.62/1,525.46 = 439.54/x
3. Step 3: Cross multiply
   1,016.62x = 1,525.46 × 439.54
4. Step 4: Simplify right side
   1,016.62x = 670,500.69
5. Step 5: Solve for x
   x = 670,500.69/1,016.62
6. Step 6: Final answer
   x = 659.54