Finding the Fourth Proportional to 321,605.91, 443,670.62 and 200,777.00

Step by Step Solution

1. Step 1: Write the proportion equation
   321,605.91 : 443,670.62 = 200,777.00 : x
2. Step 2: Convert to fraction form
   321,605.91/443,670.62 = 200,777.00/x
3. Step 3: Cross multiply
   321,605.91x = 443,670.62 × 200,777.00
4. Step 4: Simplify right side
   321,605.91x = 89,078,852,849.50
5. Step 5: Solve for x
   x = 89,078,852,849.50/321,605.91
6. Step 6: Final answer
   x = 276,981.39