Finding the Fourth Proportional to 1,456.59, 2,182.59 and 870.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.59 : 2,182.59 = 870.15 : x
2. Step 2: Convert to fraction form
   1,456.59/2,182.59 = 870.15/x
3. Step 3: Cross multiply
   1,456.59x = 2,182.59 × 870.15
4. Step 4: Simplify right side
   1,456.59x = 1,899,180.69
5. Step 5: Solve for x
   x = 1,899,180.69/1,456.59
6. Step 6: Final answer
   x = 1,303.85