Finding the Fourth Proportional to 9,948.72, 13,728.95 and 5,472.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,948.72 : 13,728.95 = 5,472.47 : x
2. Step 2: Convert to fraction form
   9,948.72/13,728.95 = 5,472.47/x
3. Step 3: Cross multiply
   9,948.72x = 13,728.95 × 5,472.47
4. Step 4: Simplify right side
   9,948.72x = 75,131,294.49
5. Step 5: Solve for x
   x = 75,131,294.49/9,948.72
6. Step 6: Final answer
   x = 7,551.85