Finding the Third Proportional to 479.59 and 740.59

Step by Step Solution

1. Step 1: Write the proportion equation
   479.59 : 740.59 = 740.59 : x
2. Step 2: Convert to fraction form
   479.59/740.59 = 740.59/x
3. Step 3: Cross multiply
   479.59x = 740.59 × 740.59
4. Step 4: Simplify right side
   479.59x = 548,479.10
5. Step 5: Solve for x
   x = 548,479.10/479.59
6. Step 6: Final answer
   x = 1,143.63