Finding the Fourth Proportional to 128,379.98, 191,629.37 and 113,229.77

Step by Step Solution

1. Step 1: Write the proportion equation
   128,379.98 : 191,629.37 = 113,229.77 : x
2. Step 2: Convert to fraction form
   128,379.98/191,629.37 = 113,229.77/x
3. Step 3: Cross multiply
   128,379.98x = 191,629.37 × 113,229.77
4. Step 4: Simplify right side
   128,379.98x = 21,698,148,815.27
5. Step 5: Solve for x
   x = 21,698,148,815.27/128,379.98
6. Step 6: Final answer
   x = 169,015.05