Finding the Fourth Proportional to 8,111.28, 11,198.43 and 7,270.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.28 : 11,198.43 = 7,270.50 : x
2. Step 2: Convert to fraction form
   8,111.28/11,198.43 = 7,270.50/x
3. Step 3: Cross multiply
   8,111.28x = 11,198.43 × 7,270.50
4. Step 4: Simplify right side
   8,111.28x = 81,418,185.32
5. Step 5: Solve for x
   x = 81,418,185.32/8,111.28
6. Step 6: Final answer
   x = 10,037.65