Finding the Fourth Proportional to 2,150.50, 3,220.55 and 1,223.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.50 : 3,220.55 = 1,223.25 : x
2. Step 2: Convert to fraction form
   2,150.50/3,220.55 = 1,223.25/x
3. Step 3: Cross multiply
   2,150.50x = 3,220.55 × 1,223.25
4. Step 4: Simplify right side
   2,150.50x = 3,939,527.94
5. Step 5: Solve for x
   x = 3,939,527.94/2,150.50
6. Step 6: Final answer
   x = 1,831.91