Finding the Fourth Proportional to 13,196.07, 18,210.57 and 7,228.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.07 : 18,210.57 = 7,228.11 : x
2. Step 2: Convert to fraction form
   13,196.07/18,210.57 = 7,228.11/x
3. Step 3: Cross multiply
   13,196.07x = 18,210.57 × 7,228.11
4. Step 4: Simplify right side
   13,196.07x = 131,628,003.12
5. Step 5: Solve for x
   x = 131,628,003.12/13,196.07
6. Step 6: Final answer
   x = 9,974.79