Finding the Fourth Proportional to 449,300.38, 620,011.40 and 245,311.98

Step by Step Solution

1. Step 1: Write the proportion equation
   449,300.38 : 620,011.40 = 245,311.98 : x
2. Step 2: Convert to fraction form
   449,300.38/620,011.40 = 245,311.98/x
3. Step 3: Cross multiply
   449,300.38x = 620,011.40 × 245,311.98
4. Step 4: Simplify right side
   449,300.38x = 152,096,224,156.57
5. Step 5: Solve for x
   x = 152,096,224,156.57/449,300.38
6. Step 6: Final answer
   x = 338,517.91