Finding the Fourth Proportional to 321,070.54, 443,080.61 and 193,721.53

Step by Step Solution

1. Step 1: Write the proportion equation
   321,070.54 : 443,080.61 = 193,721.53 : x
2. Step 2: Convert to fraction form
   321,070.54/443,080.61 = 193,721.53/x
3. Step 3: Cross multiply
   321,070.54x = 443,080.61 × 193,721.53
4. Step 4: Simplify right side
   321,070.54x = 85,834,250,498.52
5. Step 5: Solve for x
   x = 85,834,250,498.52/321,070.54
6. Step 6: Final answer
   x = 267,337.68