Finding the Fourth Proportional to 13,186.09, 18,196.86 and 7,217.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,186.09 : 18,196.86 = 7,217.83 : x
2. Step 2: Convert to fraction form
   13,186.09/18,196.86 = 7,217.83/x
3. Step 3: Cross multiply
   13,186.09x = 18,196.86 × 7,217.83
4. Step 4: Simplify right side
   13,186.09x = 131,341,842.01
5. Step 5: Solve for x
   x = 131,341,842.01/13,186.09
6. Step 6: Final answer
   x = 9,960.64