Finding the Fourth Proportional to 9,948.71, 13,728.87 and 5,472.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,948.71 : 13,728.87 = 5,472.05 : x
2. Step 2: Convert to fraction form
   9,948.71/13,728.87 = 5,472.05/x
3. Step 3: Cross multiply
   9,948.71x = 13,728.87 × 5,472.05
4. Step 4: Simplify right side
   9,948.71x = 75,124,994.44
5. Step 5: Solve for x
   x = 75,124,994.44/9,948.71
6. Step 6: Final answer
   x = 7,551.23