Finding the Fourth Proportional to 13,522.72, 18,661.18 and 7,554.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,522.72 : 18,661.18 = 7,554.64 : x
2. Step 2: Convert to fraction form
   13,522.72/18,661.18 = 7,554.64/x
3. Step 3: Cross multiply
   13,522.72x = 18,661.18 × 7,554.64
4. Step 4: Simplify right side
   13,522.72x = 140,978,496.88
5. Step 5: Solve for x
   x = 140,978,496.88/13,522.72
6. Step 6: Final answer
   x = 10,425.31