Finding the Fourth Proportional to 33,978.26, 50,987.45 and 12,936.02

Step by Step Solution

1. Step 1: Write the proportion equation
   33,978.26 : 50,987.45 = 12,936.02 : x
2. Step 2: Convert to fraction form
   33,978.26/50,987.45 = 12,936.02/x
3. Step 3: Cross multiply
   33,978.26x = 50,987.45 × 12,936.02
4. Step 4: Simplify right side
   33,978.26x = 659,574,450.35
5. Step 5: Solve for x
   x = 659,574,450.35/33,978.26
6. Step 6: Final answer
   x = 19,411.66