Finding the Fourth Proportional to 2,555.22, 3,831.54 and 911.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.22 : 3,831.54 = 911.52 : x
2. Step 2: Convert to fraction form
   2,555.22/3,831.54 = 911.52/x
3. Step 3: Cross multiply
   2,555.22x = 3,831.54 × 911.52
4. Step 4: Simplify right side
   2,555.22x = 3,492,525.34
5. Step 5: Solve for x
   x = 3,492,525.34/2,555.22
6. Step 6: Final answer
   x = 1,366.82