Finding the Fourth Proportional to 9,128.89, 13,685.13 and 3,281.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.89 : 13,685.13 = 3,281.41 : x
2. Step 2: Convert to fraction form
   9,128.89/13,685.13 = 3,281.41/x
3. Step 3: Cross multiply
   9,128.89x = 13,685.13 × 3,281.41
4. Step 4: Simplify right side
   9,128.89x = 44,906,522.43
5. Step 5: Solve for x
   x = 44,906,522.43/9,128.89
6. Step 6: Final answer
   x = 4,919.17