Finding the Fourth Proportional to 449,513.56, 620,320.89 and 245,559.25

Step by Step Solution

1. Step 1: Write the proportion equation
   449,513.56 : 620,320.89 = 245,559.25 : x
2. Step 2: Convert to fraction form
   449,513.56/620,320.89 = 245,559.25/x
3. Step 3: Cross multiply
   449,513.56x = 620,320.89 × 245,559.25
4. Step 4: Simplify right side
   449,513.56x = 152,325,532,507.73
5. Step 5: Solve for x
   x = 152,325,532,507.73/449,513.56
6. Step 6: Final answer
   x = 338,867.49