Finding the Fourth Proportional to 23,100.81, 31,879.11 and 13,029.23

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.81 : 31,879.11 = 13,029.23 : x
2. Step 2: Convert to fraction form
   23,100.81/31,879.11 = 13,029.23/x
3. Step 3: Cross multiply
   23,100.81x = 31,879.11 × 13,029.23
4. Step 4: Simplify right side
   23,100.81x = 415,360,111.54
5. Step 5: Solve for x
   x = 415,360,111.54/23,100.81
6. Step 6: Final answer
   x = 17,980.33