Finding the Fourth Proportional to 325,978.92, 488,685.69 and 126,161.78

Step by Step Solution

1. Step 1: Write the proportion equation
   325,978.92 : 488,685.69 = 126,161.78 : x
2. Step 2: Convert to fraction form
   325,978.92/488,685.69 = 126,161.78/x
3. Step 3: Cross multiply
   325,978.92x = 488,685.69 × 126,161.78
4. Step 4: Simplify right side
   325,978.92x = 61,653,454,067.50
5. Step 5: Solve for x
   x = 61,653,454,067.50/325,978.92
6. Step 6: Final answer
   x = 189,133.25