Finding the Fourth Proportional to 11,022.44, 15,215.34 and 7,667.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,022.44 : 15,215.34 = 7,667.21 : x
2. Step 2: Convert to fraction form
   11,022.44/15,215.34 = 7,667.21/x
3. Step 3: Cross multiply
   11,022.44x = 15,215.34 × 7,667.21
4. Step 4: Simplify right side
   11,022.44x = 116,659,092.59
5. Step 5: Solve for x
   x = 116,659,092.59/11,022.44
6. Step 6: Final answer
   x = 10,583.78