Finding the Fourth Proportional to 8,878.22, 12,256.38 and 5,522.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,878.22 : 12,256.38 = 5,522.11 : x
2. Step 2: Convert to fraction form
   8,878.22/12,256.38 = 5,522.11/x
3. Step 3: Cross multiply
   8,878.22x = 12,256.38 × 5,522.11
4. Step 4: Simplify right side
   8,878.22x = 67,681,078.56
5. Step 5: Solve for x
   x = 67,681,078.56/8,878.22
6. Step 6: Final answer
   x = 7,623.27