Finding the Fourth Proportional to 9,728.36, 14,499.99 and 9,174.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,728.36 : 14,499.99 = 9,174.72 : x
2. Step 2: Convert to fraction form
   9,728.36/14,499.99 = 9,174.72/x
3. Step 3: Cross multiply
   9,728.36x = 14,499.99 × 9,174.72
4. Step 4: Simplify right side
   9,728.36x = 133,033,348.25
5. Step 5: Solve for x
   x = 133,033,348.25/9,728.36
6. Step 6: Final answer
   x = 13,674.80