Finding the Fourth Proportional to 23,940.78, 33,036.84 and 13,868.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,940.78 : 33,036.84 = 13,868.57 : x
2. Step 2: Convert to fraction form
   23,940.78/33,036.84 = 13,868.57/x
3. Step 3: Cross multiply
   23,940.78x = 33,036.84 × 13,868.57
4. Step 4: Simplify right side
   23,940.78x = 458,173,562.93
5. Step 5: Solve for x
   x = 458,173,562.93/23,940.78
6. Step 6: Final answer
   x = 19,137.79