Finding the Third Proportional to 999.42 and 1,306.69

Step by Step Solution

1. Step 1: Write the proportion equation
   999.42 : 1,306.69 = 1,306.69 : x
2. Step 2: Convert to fraction form
   999.42/1,306.69 = 1,306.69/x
3. Step 3: Cross multiply
   999.42x = 1,306.69 × 1,306.69
4. Step 4: Simplify right side
   999.42x = 1,707,432.22
5. Step 5: Solve for x
   x = 1,707,432.22/999.42
6. Step 6: Final answer
   x = 1,708.42