Finding the Fourth Proportional to 2,627.12, 3,939.16 and 1,395.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.12 : 3,939.16 = 1,395.12 : x
2. Step 2: Convert to fraction form
   2,627.12/3,939.16 = 1,395.12/x
3. Step 3: Cross multiply
   2,627.12x = 3,939.16 × 1,395.12
4. Step 4: Simplify right side
   2,627.12x = 5,495,600.90
5. Step 5: Solve for x
   x = 5,495,600.90/2,627.12
6. Step 6: Final answer
   x = 2,091.87