Finding the Fourth Proportional to 9,948.66, 13,728.96 and 5,472.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,948.66 : 13,728.96 = 5,472.15 : x
2. Step 2: Convert to fraction form
   9,948.66/13,728.96 = 5,472.15/x
3. Step 3: Cross multiply
   9,948.66x = 13,728.96 × 5,472.15
4. Step 4: Simplify right side
   9,948.66x = 75,126,928.46
5. Step 5: Solve for x
   x = 75,126,928.46/9,948.66
6. Step 6: Final answer
   x = 7,551.46