Finding the Fourth Proportional to 2,386.55, 3,293.51 and 1,392.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.55 : 3,293.51 = 1,392.48 : x
2. Step 2: Convert to fraction form
   2,386.55/3,293.51 = 1,392.48/x
3. Step 3: Cross multiply
   2,386.55x = 3,293.51 × 1,392.48
4. Step 4: Simplify right side
   2,386.55x = 4,586,139.84
5. Step 5: Solve for x
   x = 4,586,139.84/2,386.55
6. Step 6: Final answer
   x = 1,921.66