Finding the Fourth Proportional to 23,111.52, 31,891.50 and 13,040.52

Step by Step Solution

1. Step 1: Write the proportion equation
   23,111.52 : 31,891.50 = 13,040.52 : x
2. Step 2: Convert to fraction form
   23,111.52/31,891.50 = 13,040.52/x
3. Step 3: Cross multiply
   23,111.52x = 31,891.50 × 13,040.52
4. Step 4: Simplify right side
   23,111.52x = 415,881,743.58
5. Step 5: Solve for x
   x = 415,881,743.58/23,111.52
6. Step 6: Final answer
   x = 17,994.56