Finding the Fourth Proportional to 321,395, 443,478.54 and 178,155

Step by Step Solution

1. Step 1: Write the proportion equation
   321,395 : 443,478.54 = 178,155 : x
2. Step 2: Convert to fraction form
   321,395/443,478.54 = 178,155/x
3. Step 3: Cross multiply
   321,395x = 443,478.54 × 178,155
4. Step 4: Simplify right side
   321,395x = 79,007,919,293.70
5. Step 5: Solve for x
   x = 79,007,919,293.70/321,395
6. Step 6: Final answer
   x = 245,828.09