Finding the Fourth Proportional to 9,721.05, 13,415.30 and 5,472.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.05 : 13,415.30 = 5,472.27 : x
2. Step 2: Convert to fraction form
   9,721.05/13,415.30 = 5,472.27/x
3. Step 3: Cross multiply
   9,721.05x = 13,415.30 × 5,472.27
4. Step 4: Simplify right side
   9,721.05x = 73,412,107.10
5. Step 5: Solve for x
   x = 73,412,107.10/9,721.05
6. Step 6: Final answer
   x = 7,551.87