Finding the Fourth Proportional to 13,538.72, 18,682.98 and 7,571.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,538.72 : 18,682.98 = 7,571.04 : x
2. Step 2: Convert to fraction form
   13,538.72/18,682.98 = 7,571.04/x
3. Step 3: Cross multiply
   13,538.72x = 18,682.98 × 7,571.04
4. Step 4: Simplify right side
   13,538.72x = 141,449,588.90
5. Step 5: Solve for x
   x = 141,449,588.90/13,538.72
6. Step 6: Final answer
   x = 10,447.78