Finding the Fourth Proportional to 321,647.78, 443,837.12 and 185,681.18

Step by Step Solution

1. Step 1: Write the proportion equation
   321,647.78 : 443,837.12 = 185,681.18 : x
2. Step 2: Convert to fraction form
   321,647.78/443,837.12 = 185,681.18/x
3. Step 3: Cross multiply
   321,647.78x = 443,837.12 × 185,681.18
4. Step 4: Simplify right side
   321,647.78x = 82,412,200,169.40
5. Step 5: Solve for x
   x = 82,412,200,169.40/321,647.78
6. Step 6: Final answer
   x = 256,218.77