Finding the Fourth Proportional to 10,144.50, 13,999.41 and 5,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,144.50 : 13,999.41 = 5,728.50 : x
2. Step 2: Convert to fraction form
   10,144.50/13,999.41 = 5,728.50/x
3. Step 3: Cross multiply
   10,144.50x = 13,999.41 × 5,728.50
4. Step 4: Simplify right side
   10,144.50x = 80,195,620.19
5. Step 5: Solve for x
   x = 80,195,620.19/10,144.50
6. Step 6: Final answer
   x = 7,905.33