Finding the Fourth Proportional to 13,196.31, 18,211.06 and 7,227.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.31 : 18,211.06 = 7,227.82 : x
2. Step 2: Convert to fraction form
   13,196.31/18,211.06 = 7,227.82/x
3. Step 3: Cross multiply
   13,196.31x = 18,211.06 × 7,227.82
4. Step 4: Simplify right side
   13,196.31x = 131,626,263.69
5. Step 5: Solve for x
   x = 131,626,263.69/13,196.31
6. Step 6: Final answer
   x = 9,974.47