Finding the Fourth Proportional to 400,946.78, 553,096.59 and 247,936.16

Step by Step Solution

1. Step 1: Write the proportion equation
   400,946.78 : 553,096.59 = 247,936.16 : x
2. Step 2: Convert to fraction form
   400,946.78/553,096.59 = 247,936.16/x
3. Step 3: Cross multiply
   400,946.78x = 553,096.59 × 247,936.16
4. Step 4: Simplify right side
   400,946.78x = 137,132,644,633.69
5. Step 5: Solve for x
   x = 137,132,644,633.69/400,946.78
6. Step 6: Final answer
   x = 342,022.06