Finding the Fourth Proportional to 53,978.78, 80,973.56 and 16,538.42

Step by Step Solution

1. Step 1: Write the proportion equation
   53,978.78 : 80,973.56 = 16,538.42 : x
2. Step 2: Convert to fraction form
   53,978.78/80,973.56 = 16,538.42/x
3. Step 3: Cross multiply
   53,978.78x = 80,973.56 × 16,538.42
4. Step 4: Simplify right side
   53,978.78x = 1,339,174,744.18
5. Step 5: Solve for x
   x = 1,339,174,744.18/53,978.78
6. Step 6: Final answer
   x = 24,809.28