Finding the Fourth Proportional to 2,386.85, 3,293.82 and 1,392.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.85 : 3,293.82 = 1,392.17 : x
2. Step 2: Convert to fraction form
   2,386.85/3,293.82 = 1,392.17/x
3. Step 3: Cross multiply
   2,386.85x = 3,293.82 × 1,392.17
4. Step 4: Simplify right side
   2,386.85x = 4,585,557.39
5. Step 5: Solve for x
   x = 4,585,557.39/2,386.85
6. Step 6: Final answer
   x = 1,921.18