Finding the Fourth Proportional to 9,721.30, 13,415.25 and 5,472.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.30 : 13,415.25 = 5,472.04 : x
2. Step 2: Convert to fraction form
   9,721.30/13,415.25 = 5,472.04/x
3. Step 3: Cross multiply
   9,721.30x = 13,415.25 × 5,472.04
4. Step 4: Simplify right side
   9,721.30x = 73,408,784.61
5. Step 5: Solve for x
   x = 73,408,784.61/9,721.30
6. Step 6: Final answer
   x = 7,551.33