Finding the Fourth Proportional to 2,677.05, 4,016.39 and 1,215

Step by Step Solution

1. Step 1: Write the proportion equation
   2,677.05 : 4,016.39 = 1,215 : x
2. Step 2: Convert to fraction form
   2,677.05/4,016.39 = 1,215/x
3. Step 3: Cross multiply
   2,677.05x = 4,016.39 × 1,215
4. Step 4: Simplify right side
   2,677.05x = 4,879,907.78
5. Step 5: Solve for x
   x = 4,879,907.78/2,677.05
6. Step 6: Final answer
   x = 1,822.87