Finding the Fourth Proportional to 53,433.88, 80,137.15 and 20,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   53,433.88 : 80,137.15 = 20,144.09 : x
2. Step 2: Convert to fraction form
   53,433.88/80,137.15 = 20,144.09/x
3. Step 3: Cross multiply
   53,433.88x = 80,137.15 × 20,144.09
4. Step 4: Simplify right side
   53,433.88x = 1,614,290,111.93
5. Step 5: Solve for x
   x = 1,614,290,111.93/53,433.88
6. Step 6: Final answer
   x = 30,210.99