Finding the Fourth Proportional to 2,111.16, 3,167.33 and 879.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.16 : 3,167.33 = 879.15 : x
2. Step 2: Convert to fraction form
   2,111.16/3,167.33 = 879.15/x
3. Step 3: Cross multiply
   2,111.16x = 3,167.33 × 879.15
4. Step 4: Simplify right side
   2,111.16x = 2,784,553.77
5. Step 5: Solve for x
   x = 2,784,553.77/2,111.16
6. Step 6: Final answer
   x = 1,318.97