Finding the Fourth Proportional to 579,426.43, 799,610.25 and 321,321.55

Step by Step Solution

1. Step 1: Write the proportion equation
   579,426.43 : 799,610.25 = 321,321.55 : x
2. Step 2: Convert to fraction form
   579,426.43/799,610.25 = 321,321.55/x
3. Step 3: Cross multiply
   579,426.43x = 799,610.25 × 321,321.55
4. Step 4: Simplify right side
   579,426.43x = 256,932,004,925.89
5. Step 5: Solve for x
   x = 256,932,004,925.89/579,426.43
6. Step 6: Final answer
   x = 443,424.72