Finding the Fourth Proportional to 321,056.78, 443,057.25 and 185,090.08

Step by Step Solution

1. Step 1: Write the proportion equation
   321,056.78 : 443,057.25 = 185,090.08 : x
2. Step 2: Convert to fraction form
   321,056.78/443,057.25 = 185,090.08/x
3. Step 3: Cross multiply
   321,056.78x = 443,057.25 × 185,090.08
4. Step 4: Simplify right side
   321,056.78x = 82,005,501,847.08
5. Step 5: Solve for x
   x = 82,005,501,847.08/321,056.78
6. Step 6: Final answer
   x = 255,423.67