Finding the Fourth Proportional to 7,144.68, 9,859.72 and 4,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,144.68 : 9,859.72 = 4,311.50 : x
2. Step 2: Convert to fraction form
   7,144.68/9,859.72 = 4,311.50/x
3. Step 3: Cross multiply
   7,144.68x = 9,859.72 × 4,311.50
4. Step 4: Simplify right side
   7,144.68x = 42,510,182.78
5. Step 5: Solve for x
   x = 42,510,182.78/7,144.68
6. Step 6: Final answer
   x = 5,949.91