Finding the Fourth Proportional to 12,112, 16,715.52 and 7,144.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112 : 16,715.52 = 7,144.96 : x
2. Step 2: Convert to fraction form
   12,112/16,715.52 = 7,144.96/x
3. Step 3: Cross multiply
   12,112x = 16,715.52 × 7,144.96
4. Step 4: Simplify right side
   12,112x = 119,431,721.78
5. Step 5: Solve for x
   x = 119,431,721.78/12,112
6. Step 6: Final answer
   x = 9,860.61