Finding the Fourth Proportional to 2,386.98, 3,293.82 and 1,392.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.98 : 3,293.82 = 1,392.12 : x
2. Step 2: Convert to fraction form
   2,386.98/3,293.82 = 1,392.12/x
3. Step 3: Cross multiply
   2,386.98x = 3,293.82 × 1,392.12
4. Step 4: Simplify right side
   2,386.98x = 4,585,392.70
5. Step 5: Solve for x
   x = 4,585,392.70/2,386.98
6. Step 6: Final answer
   x = 1,921.00