Finding the Third Proportional to 611.30 and 1,426.20

Step by Step Solution

1. Step 1: Write the proportion equation
   611.30 : 1,426.20 = 1,426.20 : x
2. Step 2: Convert to fraction form
   611.30/1,426.20 = 1,426.20/x
3. Step 3: Cross multiply
   611.30x = 1,426.20 × 1,426.20
4. Step 4: Simplify right side
   611.30x = 2,034,049.78
5. Step 5: Solve for x
   x = 2,034,049.78/611.30
6. Step 6: Final answer
   x = 3,327.43