Finding the Fourth Proportional to 2,272.61, 3,408.18 and 885.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.61 : 3,408.18 = 885.60 : x
2. Step 2: Convert to fraction form
   2,272.61/3,408.18 = 885.60/x
3. Step 3: Cross multiply
   2,272.61x = 3,408.18 × 885.60
4. Step 4: Simplify right side
   2,272.61x = 3,018,280.89
5. Step 5: Solve for x
   x = 3,018,280.89/2,272.61
6. Step 6: Final answer
   x = 1,328.11