Finding the Fourth Proportional to 2,386.98, 3,293.76 and 1,392.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.98 : 3,293.76 = 1,392.06 : x
2. Step 2: Convert to fraction form
   2,386.98/3,293.76 = 1,392.06/x
3. Step 3: Cross multiply
   2,386.98x = 3,293.76 × 1,392.06
4. Step 4: Simplify right side
   2,386.98x = 4,585,111.55
5. Step 5: Solve for x
   x = 4,585,111.55/2,386.98
6. Step 6: Final answer
   x = 1,920.88