Finding the Fourth Proportional to 13,191.60, 18,204.81 and 7,223.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.60 : 18,204.81 = 7,223.82 : x
2. Step 2: Convert to fraction form
   13,191.60/18,204.81 = 7,223.82/x
3. Step 3: Cross multiply
   13,191.60x = 18,204.81 × 7,223.82
4. Step 4: Simplify right side
   13,191.60x = 131,508,270.57
5. Step 5: Solve for x
   x = 131,508,270.57/13,191.60
6. Step 6: Final answer
   x = 9,969.09