Finding the Fourth Proportional to 388,359.36, 535,873.32 and 245,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   388,359.36 : 535,873.32 = 245,196.72 : x
2. Step 2: Convert to fraction form
   388,359.36/535,873.32 = 245,196.72/x
3. Step 3: Cross multiply
   388,359.36x = 535,873.32 × 245,196.72
4. Step 4: Simplify right side
   388,359.36x = 131,394,380,399.51
5. Step 5: Solve for x
   x = 131,394,380,399.51/388,359.36
6. Step 6: Final answer
   x = 338,331.95