Finding the Fourth Proportional to 321,522.86, 443,445.54 and 206,814.62

Step by Step Solution

1. Step 1: Write the proportion equation
   321,522.86 : 443,445.54 = 206,814.62 : x
2. Step 2: Convert to fraction form
   321,522.86/443,445.54 = 206,814.62/x
3. Step 3: Cross multiply
   321,522.86x = 443,445.54 × 206,814.62
4. Step 4: Simplify right side
   321,522.86x = 91,711,020,845.79
5. Step 5: Solve for x
   x = 91,711,020,845.79/321,522.86
6. Step 6: Final answer
   x = 285,239.50