Finding the Fourth Proportional to 1,544.45, 2,131.25 and 872.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,544.45 : 2,131.25 = 872.25 : x
2. Step 2: Convert to fraction form
   1,544.45/2,131.25 = 872.25/x
3. Step 3: Cross multiply
   1,544.45x = 2,131.25 × 872.25
4. Step 4: Simplify right side
   1,544.45x = 1,858,978.45
5. Step 5: Solve for x
   x = 1,858,978.45/1,544.45
6. Step 6: Final answer
   x = 1,203.65