Finding the Fourth Proportional to 2,111.06, 3,166.23 and 878.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.06 : 3,166.23 = 878.14 : x
2. Step 2: Convert to fraction form
   2,111.06/3,166.23 = 878.14/x
3. Step 3: Cross multiply
   2,111.06x = 3,166.23 × 878.14
4. Step 4: Simplify right side
   2,111.06x = 2,780,377.38
5. Step 5: Solve for x
   x = 2,780,377.38/2,111.06
6. Step 6: Final answer
   x = 1,317.05