Finding the Fourth Proportional to 2,436.77, 3,362.78 and 1,388.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.77 : 3,362.78 = 1,388.81 : x
2. Step 2: Convert to fraction form
   2,436.77/3,362.78 = 1,388.81/x
3. Step 3: Cross multiply
   2,436.77x = 3,362.78 × 1,388.81
4. Step 4: Simplify right side
   2,436.77x = 4,670,238.73
5. Step 5: Solve for x
   x = 4,670,238.73/2,436.77
6. Step 6: Final answer
   x = 1,916.57