Finding the Fourth Proportional to 2,436.71, 3,362.78 and 1,388.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.71 : 3,362.78 = 1,388.75 : x
2. Step 2: Convert to fraction form
   2,436.71/3,362.78 = 1,388.75/x
3. Step 3: Cross multiply
   2,436.71x = 3,362.78 × 1,388.75
4. Step 4: Simplify right side
   2,436.71x = 4,670,053.78
5. Step 5: Solve for x
   x = 4,670,053.78/2,436.71
6. Step 6: Final answer
   x = 1,916.54