Finding the Fourth Proportional to 321,330.06, 443,334.15 and 185,345.78

Step by Step Solution

1. Step 1: Write the proportion equation
   321,330.06 : 443,334.15 = 185,345.78 : x
2. Step 2: Convert to fraction form
   321,330.06/443,334.15 = 185,345.78/x
3. Step 3: Cross multiply
   321,330.06x = 443,334.15 × 185,345.78
4. Step 4: Simplify right side
   321,330.06x = 82,170,111,615.72
5. Step 5: Solve for x
   x = 82,170,111,615.72/321,330.06
6. Step 6: Final answer
   x = 255,718.72