Finding the Fourth Proportional to 321,399.86, 443,423.04 and 185,430.56

Step by Step Solution

1. Step 1: Write the proportion equation
   321,399.86 : 443,423.04 = 185,430.56 : x
2. Step 2: Convert to fraction form
   321,399.86/443,423.04 = 185,430.56/x
3. Step 3: Cross multiply
   321,399.86x = 443,423.04 × 185,430.56
4. Step 4: Simplify right side
   321,399.86x = 82,224,182,624.10
5. Step 5: Solve for x
   x = 82,224,182,624.10/321,399.86
6. Step 6: Final answer
   x = 255,831.42