Finding the Fourth Proportional to 13,540.57, 18,686.22 and 7,571.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,540.57 : 18,686.22 = 7,571.59 : x
2. Step 2: Convert to fraction form
   13,540.57/18,686.22 = 7,571.59/x
3. Step 3: Cross multiply
   13,540.57x = 18,686.22 × 7,571.59
4. Step 4: Simplify right side
   13,540.57x = 141,484,396.49
5. Step 5: Solve for x
   x = 141,484,396.49/13,540.57
6. Step 6: Final answer
   x = 10,448.92