Finding the Fourth Proportional to 13,191.57, 18,204.38 and 7,223.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.57 : 18,204.38 = 7,223.61 : x
2. Step 2: Convert to fraction form
   13,191.57/18,204.38 = 7,223.61/x
3. Step 3: Cross multiply
   13,191.57x = 18,204.38 × 7,223.61
4. Step 4: Simplify right side
   13,191.57x = 131,501,305.29
5. Step 5: Solve for x
   x = 131,501,305.29/13,191.57
6. Step 6: Final answer
   x = 9,968.59