Finding the Fourth Proportional to 623,196.72, 860,072.18 and 368,629.92

Step by Step Solution

1. Step 1: Write the proportion equation
   623,196.72 : 860,072.18 = 368,629.92 : x
2. Step 2: Convert to fraction form
   623,196.72/860,072.18 = 368,629.92/x
3. Step 3: Cross multiply
   623,196.72x = 860,072.18 × 368,629.92
4. Step 4: Simplify right side
   623,196.72x = 317,048,337,064.48
5. Step 5: Solve for x
   x = 317,048,337,064.48/623,196.72
6. Step 6: Final answer
   x = 508,745.20