Finding the Fourth Proportional to 449,591.72, 620,418.22 and 245,649.72

Step by Step Solution

1. Step 1: Write the proportion equation
   449,591.72 : 620,418.22 = 245,649.72 : x
2. Step 2: Convert to fraction form
   449,591.72/620,418.22 = 245,649.72/x
3. Step 3: Cross multiply
   449,591.72x = 620,418.22 × 245,649.72
4. Step 4: Simplify right side
   449,591.72x = 152,405,562,025.90
5. Step 5: Solve for x
   x = 152,405,562,025.90/449,591.72
6. Step 6: Final answer
   x = 338,986.59