Finding the Fourth Proportional to 2,100.15, 3,143.49 and 1,395.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.15 : 3,143.49 = 1,395.75 : x
2. Step 2: Convert to fraction form
   2,100.15/3,143.49 = 1,395.75/x
3. Step 3: Cross multiply
   2,100.15x = 3,143.49 × 1,395.75
4. Step 4: Simplify right side
   2,100.15x = 4,387,517.97
5. Step 5: Solve for x
   x = 4,387,517.97/2,100.15
6. Step 6: Final answer
   x = 2,089.14