Finding the Fourth Proportional to 2,272.72, 3,408.20 and 885.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.72 : 3,408.20 = 885.86 : x
2. Step 2: Convert to fraction form
   2,272.72/3,408.20 = 885.86/x
3. Step 3: Cross multiply
   2,272.72x = 3,408.20 × 885.86
4. Step 4: Simplify right side
   2,272.72x = 3,019,188.05
5. Step 5: Solve for x
   x = 3,019,188.05/2,272.72
6. Step 6: Final answer
   x = 1,328.45