Finding the Fourth Proportional to 2,436.31, 3,362.12 and 1,388.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.31 : 3,362.12 = 1,388.38 : x
2. Step 2: Convert to fraction form
   2,436.31/3,362.12 = 1,388.38/x
3. Step 3: Cross multiply
   2,436.31x = 3,362.12 × 1,388.38
4. Step 4: Simplify right side
   2,436.31x = 4,667,900.17
5. Step 5: Solve for x
   x = 4,667,900.17/2,436.31
6. Step 6: Final answer
   x = 1,915.97