Finding the Fourth Proportional to 321,645.78, 443,834.37 and 185,679.18

Step by Step Solution

1. Step 1: Write the proportion equation
   321,645.78 : 443,834.37 = 185,679.18 : x
2. Step 2: Convert to fraction form
   321,645.78/443,834.37 = 185,679.18/x
3. Step 3: Cross multiply
   321,645.78x = 443,834.37 × 185,679.18
4. Step 4: Simplify right side
   321,645.78x = 82,410,801,877.42
5. Step 5: Solve for x
   x = 82,410,801,877.42/321,645.78
6. Step 6: Final answer
   x = 256,216.02