Finding the Fourth Proportional to 13,208.72, 18,227.84 and 7,240.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,208.72 : 18,227.84 = 7,240.37 : x
2. Step 2: Convert to fraction form
   13,208.72/18,227.84 = 7,240.37/x
3. Step 3: Cross multiply
   13,208.72x = 18,227.84 × 7,240.37
4. Step 4: Simplify right side
   13,208.72x = 131,976,178.56
5. Step 5: Solve for x
   x = 131,976,178.56/13,208.72
6. Step 6: Final answer
   x = 9,991.60