Finding the Fourth Proportional to 321,105.86, 443,140.67 and 177,865.88

Step by Step Solution

1. Step 1: Write the proportion equation
   321,105.86 : 443,140.67 = 177,865.88 : x
2. Step 2: Convert to fraction form
   321,105.86/443,140.67 = 177,865.88/x
3. Step 3: Cross multiply
   321,105.86x = 443,140.67 × 177,865.88
4. Step 4: Simplify right side
   321,105.86x = 78,819,604,344.01
5. Step 5: Solve for x
   x = 78,819,604,344.01/321,105.86
6. Step 6: Final answer
   x = 245,462.99