Finding the Fourth Proportional to 7,003.19, 9,665.09 and 5,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,003.19 : 9,665.09 = 5,231.72 : x
2. Step 2: Convert to fraction form
   7,003.19/9,665.09 = 5,231.72/x
3. Step 3: Cross multiply
   7,003.19x = 9,665.09 × 5,231.72
4. Step 4: Simplify right side
   7,003.19x = 50,565,044.65
5. Step 5: Solve for x
   x = 50,565,044.65/7,003.19
6. Step 6: Final answer
   x = 7,220.29