Finding the Fourth Proportional to 433,016.40, 649,929.60 and 219,936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   433,016.40 : 649,929.60 = 219,936.72 : x
2. Step 2: Convert to fraction form
   433,016.40/649,929.60 = 219,936.72/x
3. Step 3: Cross multiply
   433,016.40x = 649,929.60 × 219,936.72
4. Step 4: Simplify right side
   433,016.40x = 142,943,384,454.91
5. Step 5: Solve for x
   x = 142,943,384,454.91/433,016.40
6. Step 6: Final answer
   x = 330,110.79