Finding the Fourth Proportional to 128,391.48, 192,183.72 and 88,174.98

Step by Step Solution

1. Step 1: Write the proportion equation
   128,391.48 : 192,183.72 = 88,174.98 : x
2. Step 2: Convert to fraction form
   128,391.48/192,183.72 = 88,174.98/x
3. Step 3: Cross multiply
   128,391.48x = 192,183.72 × 88,174.98
4. Step 4: Simplify right side
   128,391.48x = 16,945,795,667.33
5. Step 5: Solve for x
   x = 16,945,795,667.33/128,391.48
6. Step 6: Final answer
   x = 131,985.36