Finding the Fourth Proportional to 16,790.72, 23,172.64 and 9,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,790.72 : 23,172.64 = 9,238.56 : x
2. Step 2: Convert to fraction form
   16,790.72/23,172.64 = 9,238.56/x
3. Step 3: Cross multiply
   16,790.72x = 23,172.64 × 9,238.56
4. Step 4: Simplify right side
   16,790.72x = 214,081,825.00
5. Step 5: Solve for x
   x = 214,081,825.00/16,790.72
6. Step 6: Final answer
   x = 12,750.01