Finding the Fourth Proportional to 321,271.06, 443,365.50 and 193,921.78

Step by Step Solution

1. Step 1: Write the proportion equation
   321,271.06 : 443,365.50 = 193,921.78 : x
2. Step 2: Convert to fraction form
   321,271.06/443,365.50 = 193,921.78/x
3. Step 3: Cross multiply
   321,271.06x = 443,365.50 × 193,921.78
4. Step 4: Simplify right side
   321,271.06x = 85,978,226,950.59
5. Step 5: Solve for x
   x = 85,978,226,950.59/321,271.06
6. Step 6: Final answer
   x = 267,618.96