Finding the Fourth Proportional to 9,969.72, 13,760.32 and 5,721.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969.72 : 13,760.32 = 5,721.48 : x
2. Step 2: Convert to fraction form
   9,969.72/13,760.32 = 5,721.48/x
3. Step 3: Cross multiply
   9,969.72x = 13,760.32 × 5,721.48
4. Step 4: Simplify right side
   9,969.72x = 78,729,395.67
5. Step 5: Solve for x
   x = 78,729,395.67/9,969.72
6. Step 6: Final answer
   x = 7,896.85