Finding the Fourth Proportional to 449,595.38, 620,434.28 and 245,641.91

Step by Step Solution

1. Step 1: Write the proportion equation
   449,595.38 : 620,434.28 = 245,641.91 : x
2. Step 2: Convert to fraction form
   449,595.38/620,434.28 = 245,641.91/x
3. Step 3: Cross multiply
   449,595.38x = 620,434.28 × 245,641.91
4. Step 4: Simplify right side
   449,595.38x = 152,404,659,080.61
5. Step 5: Solve for x
   x = 152,404,659,080.61/449,595.38
6. Step 6: Final answer
   x = 338,981.82