Finding the Fourth Proportional to 12,149.89, 18,215.52 and 5,571.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,149.89 : 18,215.52 = 5,571.34 : x
2. Step 2: Convert to fraction form
   12,149.89/18,215.52 = 5,571.34/x
3. Step 3: Cross multiply
   12,149.89x = 18,215.52 × 5,571.34
4. Step 4: Simplify right side
   12,149.89x = 101,484,855.20
5. Step 5: Solve for x
   x = 101,484,855.20/12,149.89
6. Step 6: Final answer
   x = 8,352.74