Finding the Fourth Proportional to 1,222.52, 1,831.34 and 759.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.52 : 1,831.34 = 759.20 : x
2. Step 2: Convert to fraction form
   1,222.52/1,831.34 = 759.20/x
3. Step 3: Cross multiply
   1,222.52x = 1,831.34 × 759.20
4. Step 4: Simplify right side
   1,222.52x = 1,390,353.33
5. Step 5: Solve for x
   x = 1,390,353.33/1,222.52
6. Step 6: Final answer
   x = 1,137.28