Finding the Fourth Proportional to 2,111, 3,166.83 and 878.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111 : 3,166.83 = 878.48 : x
2. Step 2: Convert to fraction form
   2,111/3,166.83 = 878.48/x
3. Step 3: Cross multiply
   2,111x = 3,166.83 × 878.48
4. Step 4: Simplify right side
   2,111x = 2,781,996.82
5. Step 5: Solve for x
   x = 2,781,996.82/2,111
6. Step 6: Final answer
   x = 1,317.86