Finding the Fourth Proportional to 13,191.30, 18,204.42 and 7,223.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.30 : 18,204.42 = 7,223.19 : x
2. Step 2: Convert to fraction form
   13,191.30/18,204.42 = 7,223.19/x
3. Step 3: Cross multiply
   13,191.30x = 18,204.42 × 7,223.19
4. Step 4: Simplify right side
   13,191.30x = 131,493,984.50
5. Step 5: Solve for x
   x = 131,493,984.50/13,191.30
6. Step 6: Final answer
   x = 9,968.24