Finding the Fourth Proportional to 256,015.59, 384,067.98 and 87,552.78

Step by Step Solution

1. Step 1: Write the proportion equation
   256,015.59 : 384,067.98 = 87,552.78 : x
2. Step 2: Convert to fraction form
   256,015.59/384,067.98 = 87,552.78/x
3. Step 3: Cross multiply
   256,015.59x = 384,067.98 × 87,552.78
4. Step 4: Simplify right side
   256,015.59x = 33,626,219,357.98
5. Step 5: Solve for x
   x = 33,626,219,357.98/256,015.59
6. Step 6: Final answer
   x = 131,344.42