Finding the Fourth Proportional to 321,471.86, 443,541.56 and 253,277.55

Step by Step Solution

1. Step 1: Write the proportion equation
   321,471.86 : 443,541.56 = 253,277.55 : x
2. Step 2: Convert to fraction form
   321,471.86/443,541.56 = 253,277.55/x
3. Step 3: Cross multiply
   321,471.86x = 443,541.56 × 253,277.55
4. Step 4: Simplify right side
   321,471.86x = 112,339,118,373.59
5. Step 5: Solve for x
   x = 112,339,118,373.59/321,471.86
6. Step 6: Final answer
   x = 349,452.42