Finding the Fourth Proportional to 2,112.08, 3,167.15 and 878.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.08 : 3,167.15 = 878.76 : x
2. Step 2: Convert to fraction form
   2,112.08/3,167.15 = 878.76/x
3. Step 3: Cross multiply
   2,112.08x = 3,167.15 × 878.76
4. Step 4: Simplify right side
   2,112.08x = 2,783,164.73
5. Step 5: Solve for x
   x = 2,783,164.73/2,112.08
6. Step 6: Final answer
   x = 1,317.74