Finding the Fourth Proportional to 9,109.42, 12,571.09 and 5,523.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.42 : 12,571.09 = 5,523.20 : x
2. Step 2: Convert to fraction form
   9,109.42/12,571.09 = 5,523.20/x
3. Step 3: Cross multiply
   9,109.42x = 12,571.09 × 5,523.20
4. Step 4: Simplify right side
   9,109.42x = 69,432,644.29
5. Step 5: Solve for x
   x = 69,432,644.29/9,109.42
6. Step 6: Final answer
   x = 7,622.07