Finding the Fourth Proportional to 1,338,544.69, 2,007,062.49 and 439,745.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338,544.69 : 2,007,062.49 = 439,745.10 : x
2. Step 2: Convert to fraction form
   1,338,544.69/2,007,062.49 = 439,745.10/x
3. Step 3: Cross multiply
   1,338,544.69x = 2,007,062.49 × 439,745.10
4. Step 4: Simplify right side
   1,338,544.69x = 882,595,889,493.86
5. Step 5: Solve for x
   x = 882,595,889,493.86/1,338,544.69
6. Step 6: Final answer
   x = 659,369.76