Finding the Fourth Proportional to 1,544.35, 2,131.39 and 881.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.35 : 2,131.39 = 881.31 : x
2. Step 2: Convert to fraction form
   1,544.35/2,131.39 = 881.31/x
3. Step 3: Cross multiply
   1,544.35x = 2,131.39 × 881.31
4. Step 4: Simplify right side
   1,544.35x = 1,878,421.94
5. Step 5: Solve for x
   x = 1,878,421.94/1,544.35
6. Step 6: Final answer
   x = 1,216.32