Finding the Fourth Proportional to 628,866.69, 867,834.72 and 342,384.27

Step by Step Solution

1. Step 1: Write the proportion equation
   628,866.69 : 867,834.72 = 342,384.27 : x
2. Step 2: Convert to fraction form
   628,866.69/867,834.72 = 342,384.27/x
3. Step 3: Cross multiply
   628,866.69x = 867,834.72 × 342,384.27
4. Step 4: Simplify right side
   628,866.69x = 297,132,957,087.85
5. Step 5: Solve for x
   x = 297,132,957,087.85/628,866.69
6. Step 6: Final answer
   x = 472,489.58