Finding the Fourth Proportional to 356,113.98, 491,443.47 and 220,144.55

Step by Step Solution

1. Step 1: Write the proportion equation
   356,113.98 : 491,443.47 = 220,144.55 : x
2. Step 2: Convert to fraction form
   356,113.98/491,443.47 = 220,144.55/x
3. Step 3: Cross multiply
   356,113.98x = 491,443.47 × 220,144.55
4. Step 4: Simplify right side
   356,113.98x = 108,188,599,096.37
5. Step 5: Solve for x
   x = 108,188,599,096.37/356,113.98
6. Step 6: Final answer
   x = 303,803.29