Finding the Fourth Proportional to 128,016.72, 192,123.09 and 57,945.24

Step by Step Solution

1. Step 1: Write the proportion equation
   128,016.72 : 192,123.09 = 57,945.24 : x
2. Step 2: Convert to fraction form
   128,016.72/192,123.09 = 57,945.24/x
3. Step 3: Cross multiply
   128,016.72x = 192,123.09 × 57,945.24
4. Step 4: Simplify right side
   128,016.72x = 11,132,618,559.59
5. Step 5: Solve for x
   x = 11,132,618,559.59/128,016.72
6. Step 6: Final answer
   x = 86,962.22