Finding the Fourth Proportional to 33,978.88, 50,949.12 and 13,982.80

Step by Step Solution

1. Step 1: Write the proportion equation
   33,978.88 : 50,949.12 = 13,982.80 : x
2. Step 2: Convert to fraction form
   33,978.88/50,949.12 = 13,982.80/x
3. Step 3: Cross multiply
   33,978.88x = 50,949.12 × 13,982.80
4. Step 4: Simplify right side
   33,978.88x = 712,411,355.14
5. Step 5: Solve for x
   x = 712,411,355.14/33,978.88
6. Step 6: Final answer
   x = 20,966.30