Finding the Fourth Proportional to 12,408.56, 17,116.62 and 8,160.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,408.56 : 17,116.62 = 8,160.38 : x
2. Step 2: Convert to fraction form
   12,408.56/17,116.62 = 8,160.38/x
3. Step 3: Cross multiply
   12,408.56x = 17,116.62 × 8,160.38
4. Step 4: Simplify right side
   12,408.56x = 139,678,123.52
5. Step 5: Solve for x
   x = 139,678,123.52/12,408.56
6. Step 6: Final answer
   x = 11,256.59