Finding the Fourth Proportional to 2,448.30, 3,378.42 and 1,386.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.30 : 3,378.42 = 1,386.17 : x
2. Step 2: Convert to fraction form
   2,448.30/3,378.42 = 1,386.17/x
3. Step 3: Cross multiply
   2,448.30x = 3,378.42 × 1,386.17
4. Step 4: Simplify right side
   2,448.30x = 4,683,047.56
5. Step 5: Solve for x
   x = 4,683,047.56/2,448.30
6. Step 6: Final answer
   x = 1,912.78