Finding the Fourth Proportional to 2,112.88, 3,170.18 and 880.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.88 : 3,170.18 = 880.06 : x
2. Step 2: Convert to fraction form
   2,112.88/3,170.18 = 880.06/x
3. Step 3: Cross multiply
   2,112.88x = 3,170.18 × 880.06
4. Step 4: Simplify right side
   2,112.88x = 2,789,948.61
5. Step 5: Solve for x
   x = 2,789,948.61/2,112.88
6. Step 6: Final answer
   x = 1,320.45