Finding the Fourth Proportional to 18,099.40, 24,978.17 and 10,144.18

Step by Step Solution

1. Step 1: Write the proportion equation
   18,099.40 : 24,978.17 = 10,144.18 : x
2. Step 2: Convert to fraction form
   18,099.40/24,978.17 = 10,144.18/x
3. Step 3: Cross multiply
   18,099.40x = 24,978.17 × 10,144.18
4. Step 4: Simplify right side
   18,099.40x = 253,382,876.94
5. Step 5: Solve for x
   x = 253,382,876.94/18,099.40
6. Step 6: Final answer
   x = 13,999.52