Finding the Fourth Proportional to 2,048.15, 3,072.09 and 878.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.15 : 3,072.09 = 878.15 : x
2. Step 2: Convert to fraction form
   2,048.15/3,072.09 = 878.15/x
3. Step 3: Cross multiply
   2,048.15x = 3,072.09 × 878.15
4. Step 4: Simplify right side
   2,048.15x = 2,697,755.83
5. Step 5: Solve for x
   x = 2,697,755.83/2,048.15
6. Step 6: Final answer
   x = 1,317.17