Finding the Fourth Proportional to 11,290.91, 15,575.72 and 7,509.22

Step by Step Solution

1. Step 1: Write the proportion equation
   11,290.91 : 15,575.72 = 7,509.22 : x
2. Step 2: Convert to fraction form
   11,290.91/15,575.72 = 7,509.22/x
3. Step 3: Cross multiply
   11,290.91x = 15,575.72 × 7,509.22
4. Step 4: Simplify right side
   11,290.91x = 116,961,431.65
5. Step 5: Solve for x
   x = 116,961,431.65/11,290.91
6. Step 6: Final answer
   x = 10,358.91