Finding the Fourth Proportional to 2,112.51, 3,167.91 and 879.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.51 : 3,167.91 = 879.33 : x
2. Step 2: Convert to fraction form
   2,112.51/3,167.91 = 879.33/x
3. Step 3: Cross multiply
   2,112.51x = 3,167.91 × 879.33
4. Step 4: Simplify right side
   2,112.51x = 2,785,638.30
5. Step 5: Solve for x
   x = 2,785,638.30/2,112.51
6. Step 6: Final answer
   x = 1,318.64