Finding the Fourth Proportional to 401,580.78, 602,662.49 and 323,636.10

Step by Step Solution

1. Step 1: Write the proportion equation
   401,580.78 : 602,662.49 = 323,636.10 : x
2. Step 2: Convert to fraction form
   401,580.78/602,662.49 = 323,636.10/x
3. Step 3: Cross multiply
   401,580.78x = 602,662.49 × 323,636.10
4. Step 4: Simplify right side
   401,580.78x = 195,043,337,879.89
5. Step 5: Solve for x
   x = 195,043,337,879.89/401,580.78
6. Step 6: Final answer
   x = 485,688.93