Finding the Fourth Proportional to 1,151.69, 1,726.72 and 664.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.69 : 1,726.72 = 664.47 : x
2. Step 2: Convert to fraction form
   1,151.69/1,726.72 = 664.47/x
3. Step 3: Cross multiply
   1,151.69x = 1,726.72 × 664.47
4. Step 4: Simplify right side
   1,151.69x = 1,147,351.98
5. Step 5: Solve for x
   x = 1,147,351.98/1,151.69
6. Step 6: Final answer
   x = 996.24