Finding the Fourth Proportional to 2,111.94, 3,166.56 and 880.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.94 : 3,166.56 = 880.20 : x
2. Step 2: Convert to fraction form
   2,111.94/3,166.56 = 880.20/x
3. Step 3: Cross multiply
   2,111.94x = 3,166.56 × 880.20
4. Step 4: Simplify right side
   2,111.94x = 2,787,206.11
5. Step 5: Solve for x
   x = 2,787,206.11/2,111.94
6. Step 6: Final answer
   x = 1,319.74