Finding the Fourth Proportional to 773,940.72, 1,161,359.28 and 324,621.60

Step by Step Solution

1. Step 1: Write the proportion equation
   773,940.72 : 1,161,359.28 = 324,621.60 : x
2. Step 2: Convert to fraction form
   773,940.72/1,161,359.28 = 324,621.60/x
3. Step 3: Cross multiply
   773,940.72x = 1,161,359.28 × 324,621.60
4. Step 4: Simplify right side
   773,940.72x = 377,002,307,648.45
5. Step 5: Solve for x
   x = 377,002,307,648.45/773,940.72
6. Step 6: Final answer
   x = 487,120.39