Finding the Fourth Proportional to 628,869.69, 867,838.86 and 342,387.27

Step by Step Solution

1. Step 1: Write the proportion equation
   628,869.69 : 867,838.86 = 342,387.27 : x
2. Step 2: Convert to fraction form
   628,869.69/867,838.86 = 342,387.27/x
3. Step 3: Cross multiply
   628,869.69x = 867,838.86 × 342,387.27
4. Step 4: Simplify right side
   628,869.69x = 297,136,978,075.31
5. Step 5: Solve for x
   x = 297,136,978,075.31/628,869.69
6. Step 6: Final answer
   x = 472,493.72