Finding the Fourth Proportional to 321,146.16, 443,185.50 and 177,909

Step by Step Solution

1. Step 1: Write the proportion equation
   321,146.16 : 443,185.50 = 177,909 : x
2. Step 2: Convert to fraction form
   321,146.16/443,185.50 = 177,909/x
3. Step 3: Cross multiply
   321,146.16x = 443,185.50 × 177,909
4. Step 4: Simplify right side
   321,146.16x = 78,846,689,119.50
5. Step 5: Solve for x
   x = 78,846,689,119.50/321,146.16
6. Step 6: Final answer
   x = 245,516.52