Finding the Fourth Proportional to 8,289.22, 12,436.22 and 4,128.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,289.22 : 12,436.22 = 4,128.15 : x
2. Step 2: Convert to fraction form
   8,289.22/12,436.22 = 4,128.15/x
3. Step 3: Cross multiply
   8,289.22x = 12,436.22 × 4,128.15
4. Step 4: Simplify right side
   8,289.22x = 51,338,581.59
5. Step 5: Solve for x
   x = 51,338,581.59/8,289.22
6. Step 6: Final answer
   x = 6,193.42