Finding the Fourth Proportional to 449,530.10, 620,341.16 and 245,581.72

Step by Step Solution

1. Step 1: Write the proportion equation
   449,530.10 : 620,341.16 = 245,581.72 : x
2. Step 2: Convert to fraction form
   449,530.10/620,341.16 = 245,581.72/x
3. Step 3: Cross multiply
   449,530.10x = 620,341.16 × 245,581.72
4. Step 4: Simplify right side
   449,530.10x = 152,344,446,280.83
5. Step 5: Solve for x
   x = 152,344,446,280.83/449,530.10
6. Step 6: Final answer
   x = 338,897.10