Finding the Fourth Proportional to 2,015.68, 3,021.78 and 1,671.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.68 : 3,021.78 = 1,671.88 : x
2. Step 2: Convert to fraction form
   2,015.68/3,021.78 = 1,671.88/x
3. Step 3: Cross multiply
   2,015.68x = 3,021.78 × 1,671.88
4. Step 4: Simplify right side
   2,015.68x = 5,052,053.55
5. Step 5: Solve for x
   x = 5,052,053.55/2,015.68
6. Step 6: Final answer
   x = 2,506.38