Finding the Fourth Proportional to 14,478.72, 19,982.78 and 9,174.03

Step by Step Solution

1. Step 1: Write the proportion equation
   14,478.72 : 19,982.78 = 9,174.03 : x
2. Step 2: Convert to fraction form
   14,478.72/19,982.78 = 9,174.03/x
3. Step 3: Cross multiply
   14,478.72x = 19,982.78 × 9,174.03
4. Step 4: Simplify right side
   14,478.72x = 183,322,623.20
5. Step 5: Solve for x
   x = 183,322,623.20/14,478.72
6. Step 6: Final answer
   x = 12,661.52