Finding the Fourth Proportional to 7,144.29, 9,859.47 and 4,311.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,144.29 : 9,859.47 = 4,311.61 : x
2. Step 2: Convert to fraction form
   7,144.29/9,859.47 = 4,311.61/x
3. Step 3: Cross multiply
   7,144.29x = 9,859.47 × 4,311.61
4. Step 4: Simplify right side
   7,144.29x = 42,510,209.50
5. Step 5: Solve for x
   x = 42,510,209.50/7,144.29
6. Step 6: Final answer
   x = 5,950.24