Finding the Fourth Proportional to 8,422.76, 12,648.27 and 8,087.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,422.76 : 12,648.27 = 8,087.54 : x
2. Step 2: Convert to fraction form
   8,422.76/12,648.27 = 8,087.54/x
3. Step 3: Cross multiply
   8,422.76x = 12,648.27 × 8,087.54
4. Step 4: Simplify right side
   8,422.76x = 102,293,389.56
5. Step 5: Solve for x
   x = 102,293,389.56/8,422.76
6. Step 6: Final answer
   x = 12,144.88