Finding the Fourth Proportional to 13,185.18, 18,195.41 and 7,216.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.18 : 18,195.41 = 7,216.79 : x
2. Step 2: Convert to fraction form
   13,185.18/18,195.41 = 7,216.79/x
3. Step 3: Cross multiply
   13,185.18x = 18,195.41 × 7,216.79
4. Step 4: Simplify right side
   13,185.18x = 131,312,380.00
5. Step 5: Solve for x
   x = 131,312,380.00/13,185.18
6. Step 6: Final answer
   x = 9,959.09