Finding the Fourth Proportional to 235,928.72, 325,579.96 and 128,498.42

Step by Step Solution

1. Step 1: Write the proportion equation
   235,928.72 : 325,579.96 = 128,498.42 : x
2. Step 2: Convert to fraction form
   235,928.72/325,579.96 = 128,498.42/x
3. Step 3: Cross multiply
   235,928.72x = 325,579.96 × 128,498.42
4. Step 4: Simplify right side
   235,928.72x = 41,836,510,443.66
5. Step 5: Solve for x
   x = 41,836,510,443.66/235,928.72
6. Step 6: Final answer
   x = 177,326.91