Finding the Fourth Proportional to 321,648.78, 443,838.50 and 185,682.18

Step by Step Solution

1. Step 1: Write the proportion equation
   321,648.78 : 443,838.50 = 185,682.18 : x
2. Step 2: Convert to fraction form
   321,648.78/443,838.50 = 185,682.18/x
3. Step 3: Cross multiply
   321,648.78x = 443,838.50 × 185,682.18
4. Step 4: Simplify right side
   321,648.78x = 82,412,900,247.93
5. Step 5: Solve for x
   x = 82,412,900,247.93/321,648.78
6. Step 6: Final answer
   x = 256,220.15