Finding the Fourth Proportional to 2,688.29, 4,033.73 and 1,389.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.29 : 4,033.73 = 1,389.77 : x
2. Step 2: Convert to fraction form
   2,688.29/4,033.73 = 1,389.77/x
3. Step 3: Cross multiply
   2,688.29x = 4,033.73 × 1,389.77
4. Step 4: Simplify right side
   2,688.29x = 5,605,929.82
5. Step 5: Solve for x
   x = 5,605,929.82/2,688.29
6. Step 6: Final answer
   x = 2,085.32