Finding the Fourth Proportional to 9,948.63, 13,728.82 and 5,472.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,948.63 : 13,728.82 = 5,472.38 : x
2. Step 2: Convert to fraction form
   9,948.63/13,728.82 = 5,472.38/x
3. Step 3: Cross multiply
   9,948.63x = 13,728.82 × 5,472.38
4. Step 4: Simplify right side
   9,948.63x = 75,129,312.28
5. Step 5: Solve for x
   x = 75,129,312.28/9,948.63
6. Step 6: Final answer
   x = 7,551.72