Finding the Fourth Proportional to 2,112.08, 3,165.89 and 878.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.08 : 3,165.89 = 878.24 : x
2. Step 2: Convert to fraction form
   2,112.08/3,165.89 = 878.24/x
3. Step 3: Cross multiply
   2,112.08x = 3,165.89 × 878.24
4. Step 4: Simplify right side
   2,112.08x = 2,780,414.76
5. Step 5: Solve for x
   x = 2,780,414.76/2,112.08
6. Step 6: Final answer
   x = 1,316.44