Finding the Fourth Proportional to 2,436.57, 3,362.46 and 1,388.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.57 : 3,362.46 = 1,388.63 : x
2. Step 2: Convert to fraction form
   2,436.57/3,362.46 = 1,388.63/x
3. Step 3: Cross multiply
   2,436.57x = 3,362.46 × 1,388.63
4. Step 4: Simplify right side
   2,436.57x = 4,669,212.83
5. Step 5: Solve for x
   x = 4,669,212.83/2,436.57
6. Step 6: Final answer
   x = 1,916.31