Finding the Fourth Proportional to 1,225.69, 1,839.59 and 495.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.69 : 1,839.59 = 495.79 : x
2. Step 2: Convert to fraction form
   1,225.69/1,839.59 = 495.79/x
3. Step 3: Cross multiply
   1,225.69x = 1,839.59 × 495.79
4. Step 4: Simplify right side
   1,225.69x = 912,050.33
5. Step 5: Solve for x
   x = 912,050.33/1,225.69
6. Step 6: Final answer
   x = 744.11