Finding the Fourth Proportional to 10,143.72, 13,998.08 and 5,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,143.72 : 13,998.08 = 5,667.50 : x
2. Step 2: Convert to fraction form
   10,143.72/13,998.08 = 5,667.50/x
3. Step 3: Cross multiply
   10,143.72x = 13,998.08 × 5,667.50
4. Step 4: Simplify right side
   10,143.72x = 79,334,143.65
5. Step 5: Solve for x
   x = 79,334,143.65/10,143.72
6. Step 6: Final answer
   x = 7,821.01