Finding the Fourth Proportional to 1,000.28, 1,499.52 and 350.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,000.28 : 1,499.52 = 350.72 : x
2. Step 2: Convert to fraction form
   1,000.28/1,499.52 = 350.72/x
3. Step 3: Cross multiply
   1,000.28x = 1,499.52 × 350.72
4. Step 4: Simplify right side
   1,000.28x = 525,911.65
5. Step 5: Solve for x
   x = 525,911.65/1,000.28
6. Step 6: Final answer
   x = 525.76