Finding the Fourth Proportional to 10,999.05, 15,181.41 and 7,227.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.05 : 15,181.41 = 7,227.33 : x
2. Step 2: Convert to fraction form
   10,999.05/15,181.41 = 7,227.33/x
3. Step 3: Cross multiply
   10,999.05x = 15,181.41 × 7,227.33
4. Step 4: Simplify right side
   10,999.05x = 109,721,059.94
5. Step 5: Solve for x
   x = 109,721,059.94/10,999.05
6. Step 6: Final answer
   x = 9,975.50