Finding the Third Proportional to 298.69 and 599.91

Step by Step Solution

1. Step 1: Write the proportion equation
   298.69 : 599.91 = 599.91 : x
2. Step 2: Convert to fraction form
   298.69/599.91 = 599.91/x
3. Step 3: Cross multiply
   298.69x = 599.91 × 599.91
4. Step 4: Simplify right side
   298.69x = 359,887.51
5. Step 5: Solve for x
   x = 359,887.51/298.69
6. Step 6: Final answer
   x = 1,204.90