Finding the Fourth Proportional to 33,215.16, 49,788.41 and 15,431.31

Step by Step Solution

1. Step 1: Write the proportion equation
   33,215.16 : 49,788.41 = 15,431.31 : x
2. Step 2: Convert to fraction form
   33,215.16/49,788.41 = 15,431.31/x
3. Step 3: Cross multiply
   33,215.16x = 49,788.41 × 15,431.31
4. Step 4: Simplify right side
   33,215.16x = 768,300,614.40
5. Step 5: Solve for x
   x = 768,300,614.40/33,215.16
6. Step 6: Final answer
   x = 23,131.02