Finding the Third Proportional to 575.06 and 870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   575.06 : 870.56 = 870.56 : x
2. Step 2: Convert to fraction form
   575.06/870.56 = 870.56/x
3. Step 3: Cross multiply
   575.06x = 870.56 × 870.56
4. Step 4: Simplify right side
   575.06x = 757,879.07
5. Step 5: Solve for x
   x = 757,879.07/575.06
6. Step 6: Final answer
   x = 1,317.91