Finding the Fourth Proportional to 1,006.28, 1,508.52 and 356.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,006.28 : 1,508.52 = 356.72 : x
2. Step 2: Convert to fraction form
   1,006.28/1,508.52 = 356.72/x
3. Step 3: Cross multiply
   1,006.28x = 1,508.52 × 356.72
4. Step 4: Simplify right side
   1,006.28x = 538,119.25
5. Step 5: Solve for x
   x = 538,119.25/1,006.28
6. Step 6: Final answer
   x = 534.76