Finding the Fourth Proportional to 2,112.89, 3,169.53 and 880.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.89 : 3,169.53 = 880.98 : x
2. Step 2: Convert to fraction form
   2,112.89/3,169.53 = 880.98/x
3. Step 3: Cross multiply
   2,112.89x = 3,169.53 × 880.98
4. Step 4: Simplify right side
   2,112.89x = 2,792,280.65
5. Step 5: Solve for x
   x = 2,792,280.65/2,112.89
6. Step 6: Final answer
   x = 1,321.55