Finding the Fourth Proportional to 2,111.25, 3,165.16 and 879.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.25 : 3,165.16 = 879.58 : x
2. Step 2: Convert to fraction form
   2,111.25/3,165.16 = 879.58/x
3. Step 3: Cross multiply
   2,111.25x = 3,165.16 × 879.58
4. Step 4: Simplify right side
   2,111.25x = 2,784,014.10
5. Step 5: Solve for x
   x = 2,784,014.10/2,111.25
6. Step 6: Final answer
   x = 1,318.66