Finding the Fourth Proportional to 1,388,131.83, 1,915,647.57 and 844,290.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,131.83 : 1,915,647.57 = 844,290.54 : x
2. Step 2: Convert to fraction form
   1,388,131.83/1,915,647.57 = 844,290.54/x
3. Step 3: Cross multiply
   1,388,131.83x = 1,915,647.57 × 844,290.54
4. Step 4: Simplify right side
   1,388,131.83x = 1,617,363,121,324.99
5. Step 5: Solve for x
   x = 1,617,363,121,324.99/1,388,131.83
6. Step 6: Final answer
   x = 1,165,136.54