Finding the Fourth Proportional to 13,216.38, 18,238.47 and 7,248.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,216.38 : 18,238.47 = 7,248.03 : x
2. Step 2: Convert to fraction form
   13,216.38/18,238.47 = 7,248.03/x
3. Step 3: Cross multiply
   13,216.38x = 18,238.47 × 7,248.03
4. Step 4: Simplify right side
   13,216.38x = 132,192,886.52
5. Step 5: Solve for x
   x = 132,192,886.52/13,216.38
6. Step 6: Final answer
   x = 10,002.20