Finding the Fourth Proportional to 23,111.62, 31,894.04 and 13,042.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,111.62 : 31,894.04 = 13,042.20 : x
2. Step 2: Convert to fraction form
   23,111.62/31,894.04 = 13,042.20/x
3. Step 3: Cross multiply
   23,111.62x = 31,894.04 × 13,042.20
4. Step 4: Simplify right side
   23,111.62x = 415,968,448.49
5. Step 5: Solve for x
   x = 415,968,448.49/23,111.62
6. Step 6: Final answer
   x = 17,998.24