Finding the Fourth Proportional to 23,112.72, 31,893.48 and 13,038.48

Step by Step Solution

1. Step 1: Write the proportion equation
   23,112.72 : 31,893.48 = 13,038.48 : x
2. Step 2: Convert to fraction form
   23,112.72/31,893.48 = 13,038.48/x
3. Step 3: Cross multiply
   23,112.72x = 31,893.48 × 13,038.48
4. Step 4: Simplify right side
   23,112.72x = 415,842,501.11
5. Step 5: Solve for x
   x = 415,842,501.11/23,112.72
6. Step 6: Final answer
   x = 17,991.93