Finding the Fourth Proportional to 23,139.78, 31,932.09 and 13,067.34

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139.78 : 31,932.09 = 13,067.34 : x
2. Step 2: Convert to fraction form
   23,139.78/31,932.09 = 13,067.34/x
3. Step 3: Cross multiply
   23,139.78x = 31,932.09 × 13,067.34
4. Step 4: Simplify right side
   23,139.78x = 417,267,476.94
5. Step 5: Solve for x
   x = 417,267,476.94/23,139.78
6. Step 6: Final answer
   x = 18,032.47