Finding the Fourth Proportional to 1,456.88, 2,182.01 and 870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.88 : 2,182.01 = 870.72 : x
2. Step 2: Convert to fraction form
   1,456.88/2,182.01 = 870.72/x
3. Step 3: Cross multiply
   1,456.88x = 2,182.01 × 870.72
4. Step 4: Simplify right side
   1,456.88x = 1,899,907.21
5. Step 5: Solve for x
   x = 1,899,907.21/1,456.88
6. Step 6: Final answer
   x = 1,304.10