Finding the Fourth Proportional to 1,317.25, 1,974.93 and 495.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.25 : 1,974.93 = 495.46 : x
2. Step 2: Convert to fraction form
   1,317.25/1,974.93 = 495.46/x
3. Step 3: Cross multiply
   1,317.25x = 1,974.93 × 495.46
4. Step 4: Simplify right side
   1,317.25x = 978,498.82
5. Step 5: Solve for x
   x = 978,498.82/1,317.25
6. Step 6: Final answer
   x = 742.83