Finding the Fourth Proportional to 606,942.72, 837,665.28 and 338,688

Step by Step Solution

1. Step 1: Write the proportion equation
   606,942.72 : 837,665.28 = 338,688 : x
2. Step 2: Convert to fraction form
   606,942.72/837,665.28 = 338,688/x
3. Step 3: Cross multiply
   606,942.72x = 837,665.28 × 338,688
4. Step 4: Simplify right side
   606,942.72x = 283,707,178,352.64
5. Step 5: Solve for x
   x = 283,707,178,352.64/606,942.72
6. Step 6: Final answer
   x = 467,436.50