Finding the Fourth Proportional to 321,356.42, 443,485.86 and 178,116.58

Step by Step Solution

1. Step 1: Write the proportion equation
   321,356.42 : 443,485.86 = 178,116.58 : x
2. Step 2: Convert to fraction form
   321,356.42/443,485.86 = 178,116.58/x
3. Step 3: Cross multiply
   321,356.42x = 443,485.86 × 178,116.58
4. Step 4: Simplify right side
   321,356.42x = 78,992,184,661.56
5. Step 5: Solve for x
   x = 78,992,184,661.56/321,356.42
6. Step 6: Final answer
   x = 245,808.64