Finding the Fourth Proportional to 2,672.15, 3,689.83 and 2,007.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.15 : 3,689.83 = 2,007.85 : x
2. Step 2: Convert to fraction form
   2,672.15/3,689.83 = 2,007.85/x
3. Step 3: Cross multiply
   2,672.15x = 3,689.83 × 2,007.85
4. Step 4: Simplify right side
   2,672.15x = 7,408,618.45
5. Step 5: Solve for x
   x = 7,408,618.45/2,672.15
6. Step 6: Final answer
   x = 2,772.53