Finding the Fourth Proportional to 1,072.48, 1,479.52 and 658.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.48 : 1,479.52 = 658.72 : x
2. Step 2: Convert to fraction form
   1,072.48/1,479.52 = 658.72/x
3. Step 3: Cross multiply
   1,072.48x = 1,479.52 × 658.72
4. Step 4: Simplify right side
   1,072.48x = 974,589.41
5. Step 5: Solve for x
   x = 974,589.41/1,072.48
6. Step 6: Final answer
   x = 908.73