Finding the Fourth Proportional to 53,940.43, 80,911.32 and 20,662.49

Step by Step Solution

1. Step 1: Write the proportion equation
   53,940.43 : 80,911.32 = 20,662.49 : x
2. Step 2: Convert to fraction form
   53,940.43/80,911.32 = 20,662.49/x
3. Step 3: Cross multiply
   53,940.43x = 80,911.32 × 20,662.49
4. Step 4: Simplify right side
   53,940.43x = 1,671,829,340.39
5. Step 5: Solve for x
   x = 1,671,829,340.39/53,940.43
6. Step 6: Final answer
   x = 30,993.99