Finding the Fourth Proportional to 16,791.31, 23,172.51 and 9,238.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,791.31 : 23,172.51 = 9,238.42 : x
2. Step 2: Convert to fraction form
   16,791.31/23,172.51 = 9,238.42/x
3. Step 3: Cross multiply
   16,791.31x = 23,172.51 × 9,238.42
4. Step 4: Simplify right side
   16,791.31x = 214,077,379.83
5. Step 5: Solve for x
   x = 214,077,379.83/16,791.31
6. Step 6: Final answer
   x = 12,749.30