Finding the Fourth Proportional to 1,456.01, 2,181.27 and 861.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.01 : 2,181.27 = 861.25 : x
2. Step 2: Convert to fraction form
   1,456.01/2,181.27 = 861.25/x
3. Step 3: Cross multiply
   1,456.01x = 2,181.27 × 861.25
4. Step 4: Simplify right side
   1,456.01x = 1,878,614.48
5. Step 5: Solve for x
   x = 1,878,614.48/1,456.01
6. Step 6: Final answer
   x = 1,290.25