Finding the Fourth Proportional to 13,191.37, 18,204.12 and 7,223.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.37 : 18,204.12 = 7,223.06 : x
2. Step 2: Convert to fraction form
   13,191.37/18,204.12 = 7,223.06/x
3. Step 3: Cross multiply
   13,191.37x = 18,204.12 × 7,223.06
4. Step 4: Simplify right side
   13,191.37x = 131,489,496.52
5. Step 5: Solve for x
   x = 131,489,496.52/13,191.37
6. Step 6: Final answer
   x = 9,967.84