Finding the Fourth Proportional to 13,238.48, 18,266.94 and 7,572.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,238.48 : 18,266.94 = 7,572.31 : x
2. Step 2: Convert to fraction form
   13,238.48/18,266.94 = 7,572.31/x
3. Step 3: Cross multiply
   13,238.48x = 18,266.94 × 7,572.31
4. Step 4: Simplify right side
   13,238.48x = 138,322,932.43
5. Step 5: Solve for x
   x = 138,322,932.43/13,238.48
6. Step 6: Final answer
   x = 10,448.55