Finding the Fourth Proportional to 13,520.72, 18,658.67 and 7,552.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,520.72 : 18,658.67 = 7,552.64 : x
2. Step 2: Convert to fraction form
   13,520.72/18,658.67 = 7,552.64/x
3. Step 3: Cross multiply
   13,520.72x = 18,658.67 × 7,552.64
4. Step 4: Simplify right side
   13,520.72x = 140,922,217.39
5. Step 5: Solve for x
   x = 140,922,217.39/13,520.72
6. Step 6: Final answer
   x = 10,422.69