Finding the Fourth Proportional to 9,571.86, 13,208.46 and 5,380.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,571.86 : 13,208.46 = 5,380.74 : x
2. Step 2: Convert to fraction form
   9,571.86/13,208.46 = 5,380.74/x
3. Step 3: Cross multiply
   9,571.86x = 13,208.46 × 5,380.74
4. Step 4: Simplify right side
   9,571.86x = 71,071,289.06
5. Step 5: Solve for x
   x = 71,071,289.06/9,571.86
6. Step 6: Final answer
   x = 7,425.02