Finding the Fourth Proportional to 1,317.06, 1,976.30 and 495.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.06 : 1,976.30 = 495.27 : x
2. Step 2: Convert to fraction form
   1,317.06/1,976.30 = 495.27/x
3. Step 3: Cross multiply
   1,317.06x = 1,976.30 × 495.27
4. Step 4: Simplify right side
   1,317.06x = 978,802.10
5. Step 5: Solve for x
   x = 978,802.10/1,317.06
6. Step 6: Final answer
   x = 743.17