Finding the Fourth Proportional to 13,488.37, 18,614.05 and 7,520.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.37 : 18,614.05 = 7,520.42 : x
2. Step 2: Convert to fraction form
   13,488.37/18,614.05 = 7,520.42/x
3. Step 3: Cross multiply
   13,488.37x = 18,614.05 × 7,520.42
4. Step 4: Simplify right side
   13,488.37x = 139,985,501.64
5. Step 5: Solve for x
   x = 139,985,501.64/13,488.37
6. Step 6: Final answer
   x = 10,378.24