Finding the Fourth Proportional to 449,591.50, 620,429.03 and 245,638.04

Step by Step Solution

1. Step 1: Write the proportion equation
   449,591.50 : 620,429.03 = 245,638.04 : x
2. Step 2: Convert to fraction form
   449,591.50/620,429.03 = 245,638.04/x
3. Step 3: Cross multiply
   449,591.50x = 620,429.03 × 245,638.04
4. Step 4: Simplify right side
   449,591.50x = 152,400,974,095.69
5. Step 5: Solve for x
   x = 152,400,974,095.69/449,591.50
6. Step 6: Final answer
   x = 338,976.54