Finding the Fourth Proportional to 12,099.52, 18,149.76 and 5,169.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.52 : 18,149.76 = 5,169.28 : x
2. Step 2: Convert to fraction form
   12,099.52/18,149.76 = 5,169.28/x
3. Step 3: Cross multiply
   12,099.52x = 18,149.76 × 5,169.28
4. Step 4: Simplify right side
   12,099.52x = 93,821,191.37
5. Step 5: Solve for x
   x = 93,821,191.37/12,099.52
6. Step 6: Final answer
   x = 7,754.13