Finding the Fourth Proportional to 321,057.78, 443,058.63 and 185,091.08

Step by Step Solution

1. Step 1: Write the proportion equation
   321,057.78 : 443,058.63 = 185,091.08 : x
2. Step 2: Convert to fraction form
   321,057.78/443,058.63 = 185,091.08/x
3. Step 3: Cross multiply
   321,057.78x = 443,058.63 × 185,091.08
4. Step 4: Simplify right side
   321,057.78x = 82,006,200,330.02
5. Step 5: Solve for x
   x = 82,006,200,330.02/321,057.78
6. Step 6: Final answer
   x = 255,425.05