Finding the Fourth Proportional to 628,891.89, 867,886.41 and 342,427.69

Step by Step Solution

1. Step 1: Write the proportion equation
   628,891.89 : 867,886.41 = 342,427.69 : x
2. Step 2: Convert to fraction form
   628,891.89/867,886.41 = 342,427.69/x
3. Step 3: Cross multiply
   628,891.89x = 867,886.41 × 342,427.69
4. Step 4: Simplify right side
   628,891.89x = 297,188,338,558.69
5. Step 5: Solve for x
   x = 297,188,338,558.69/628,891.89
6. Step 6: Final answer
   x = 472,558.71