Finding the Fourth Proportional to 1,544.86, 2,131.38 and 881.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.86 : 2,131.38 = 881.23 : x
2. Step 2: Convert to fraction form
   1,544.86/2,131.38 = 881.23/x
3. Step 3: Cross multiply
   1,544.86x = 2,131.38 × 881.23
4. Step 4: Simplify right side
   1,544.86x = 1,878,231.59
5. Step 5: Solve for x
   x = 1,878,231.59/1,544.86
6. Step 6: Final answer
   x = 1,215.80