Finding the Fourth Proportional to 1,544.59, 2,131.61 and 881.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.59 : 2,131.61 = 881.57 : x
2. Step 2: Convert to fraction form
   1,544.59/2,131.61 = 881.57/x
3. Step 3: Cross multiply
   1,544.59x = 2,131.61 × 881.57
4. Step 4: Simplify right side
   1,544.59x = 1,879,170.96
5. Step 5: Solve for x
   x = 1,879,170.96/1,544.59
6. Step 6: Final answer
   x = 1,216.62