Finding the Fourth Proportional to 12,128.78, 16,732.17 and 8,766.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.78 : 16,732.17 = 8,766.26 : x
2. Step 2: Convert to fraction form
   12,128.78/16,732.17 = 8,766.26/x
3. Step 3: Cross multiply
   12,128.78x = 16,732.17 × 8,766.26
4. Step 4: Simplify right side
   12,128.78x = 146,678,627.29
5. Step 5: Solve for x
   x = 146,678,627.29/12,128.78
6. Step 6: Final answer
   x = 12,093.44