Finding the Fourth Proportional to 9,567.57, 13,215.89 and 7,979.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,567.57 : 13,215.89 = 7,979.42 : x
2. Step 2: Convert to fraction form
   9,567.57/13,215.89 = 7,979.42/x
3. Step 3: Cross multiply
   9,567.57x = 13,215.89 × 7,979.42
4. Step 4: Simplify right side
   9,567.57x = 105,455,031.01
5. Step 5: Solve for x
   x = 105,455,031.01/9,567.57
6. Step 6: Final answer
   x = 11,022.13