Finding the Fourth Proportional to 2,436.33, 3,362.90 and 1,389.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.33 : 3,362.90 = 1,389.09 : x
2. Step 2: Convert to fraction form
   2,436.33/3,362.90 = 1,389.09/x
3. Step 3: Cross multiply
   2,436.33x = 3,362.90 × 1,389.09
4. Step 4: Simplify right side
   2,436.33x = 4,671,363.82
5. Step 5: Solve for x
   x = 4,671,363.82/2,436.33
6. Step 6: Final answer
   x = 1,917.38