Finding the Fourth Proportional to 13,191.41, 18,204.15 and 7,223.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.41 : 18,204.15 = 7,223.47 : x
2. Step 2: Convert to fraction form
   13,191.41/18,204.15 = 7,223.47/x
3. Step 3: Cross multiply
   13,191.41x = 18,204.15 × 7,223.47
4. Step 4: Simplify right side
   13,191.41x = 131,497,131.40
5. Step 5: Solve for x
   x = 131,497,131.40/13,191.41
6. Step 6: Final answer
   x = 9,968.39