Finding the Fourth Proportional to 2,626.83, 3,935.16 and 1,392.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,626.83 : 3,935.16 = 1,392.57 : x
2. Step 2: Convert to fraction form
   2,626.83/3,935.16 = 1,392.57/x
3. Step 3: Cross multiply
   2,626.83x = 3,935.16 × 1,392.57
4. Step 4: Simplify right side
   2,626.83x = 5,479,985.76
5. Step 5: Solve for x
   x = 5,479,985.76/2,626.83
6. Step 6: Final answer
   x = 2,086.16