Finding the Fourth Proportional to 647,087.82, 892,609.98 and 404,949.90

Step by Step Solution

1. Step 1: Write the proportion equation
   647,087.82 : 892,609.98 = 404,949.90 : x
2. Step 2: Convert to fraction form
   647,087.82/892,609.98 = 404,949.90/x
3. Step 3: Cross multiply
   647,087.82x = 892,609.98 × 404,949.90
4. Step 4: Simplify right side
   647,087.82x = 361,462,322,140.00
5. Step 5: Solve for x
   x = 361,462,322,140.00/647,087.82
6. Step 6: Final answer
   x = 558,598.56