Finding the Fourth Proportional to 323,405.23, 443,066.76 and 311,284.25

Step by Step Solution

1. Step 1: Write the proportion equation
   323,405.23 : 443,066.76 = 311,284.25 : x
2. Step 2: Convert to fraction form
   323,405.23/443,066.76 = 311,284.25/x
3. Step 3: Cross multiply
   323,405.23x = 443,066.76 × 311,284.25
4. Step 4: Simplify right side
   323,405.23x = 137,919,700,314.78
5. Step 5: Solve for x
   x = 137,919,700,314.78/323,405.23
6. Step 6: Final answer
   x = 426,460.95