Finding the Fourth Proportional to 2,436.98, 3,363.09 and 1,389.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.98 : 3,363.09 = 1,389.02 : x
2. Step 2: Convert to fraction form
   2,436.98/3,363.09 = 1,389.02/x
3. Step 3: Cross multiply
   2,436.98x = 3,363.09 × 1,389.02
4. Step 4: Simplify right side
   2,436.98x = 4,671,399.27
5. Step 5: Solve for x
   x = 4,671,399.27/2,436.98
6. Step 6: Final answer
   x = 1,916.88