Finding the Fourth Proportional to 13,538.48, 18,682.32 and 7,488.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,538.48 : 18,682.32 = 7,488.35 : x
2. Step 2: Convert to fraction form
   13,538.48/18,682.32 = 7,488.35/x
3. Step 3: Cross multiply
   13,538.48x = 18,682.32 × 7,488.35
4. Step 4: Simplify right side
   13,538.48x = 139,899,797.68
5. Step 5: Solve for x
   x = 139,899,797.68/13,538.48
6. Step 6: Final answer
   x = 10,333.50