Finding the Fourth Proportional to 10,143.50, 13,999.43 and 5,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,143.50 : 13,999.43 = 5,667.50 : x
2. Step 2: Convert to fraction form
   10,143.50/13,999.43 = 5,667.50/x
3. Step 3: Cross multiply
   10,143.50x = 13,999.43 × 5,667.50
4. Step 4: Simplify right side
   10,143.50x = 79,341,818.69
5. Step 5: Solve for x
   x = 79,341,818.69/10,143.50
6. Step 6: Final answer
   x = 7,821.94