Finding the Fourth Proportional to 13,208.57, 18,227.43 and 7,240.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,208.57 : 18,227.43 = 7,240.03 : x
2. Step 2: Convert to fraction form
   13,208.57/18,227.43 = 7,240.03/x
3. Step 3: Cross multiply
   13,208.57x = 18,227.43 × 7,240.03
4. Step 4: Simplify right side
   13,208.57x = 131,967,196.98
5. Step 5: Solve for x
   x = 131,967,196.98/13,208.57
6. Step 6: Final answer
   x = 9,991.03