Finding the Fourth Proportional to 13,887.72, 19,168.61 and 8,579.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,887.72 : 19,168.61 = 8,579.48 : x
2. Step 2: Convert to fraction form
   13,887.72/19,168.61 = 8,579.48/x
3. Step 3: Cross multiply
   13,887.72x = 19,168.61 × 8,579.48
4. Step 4: Simplify right side
   13,887.72x = 164,456,567.38
5. Step 5: Solve for x
   x = 164,456,567.38/13,887.72
6. Step 6: Final answer
   x = 11,841.87