Finding the Fourth Proportional to 321,144.27, 443,172.98 and 177,905.49

Step by Step Solution

1. Step 1: Write the proportion equation
   321,144.27 : 443,172.98 = 177,905.49 : x
2. Step 2: Convert to fraction form
   321,144.27/443,172.98 = 177,905.49/x
3. Step 3: Cross multiply
   321,144.27x = 443,172.98 × 177,905.49
4. Step 4: Simplify right side
   321,144.27x = 78,842,904,944.53
5. Step 5: Solve for x
   x = 78,842,904,944.53/321,144.27
6. Step 6: Final answer
   x = 245,506.19