Finding the Third Proportional to 1,423.69 and 1,720.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.69 : 1,720.69 = 1,720.69 : x
2. Step 2: Convert to fraction form
   1,423.69/1,720.69 = 1,720.69/x
3. Step 3: Cross multiply
   1,423.69x = 1,720.69 × 1,720.69
4. Step 4: Simplify right side
   1,423.69x = 2,960,765.47
5. Step 5: Solve for x
   x = 2,960,765.47/1,423.69
6. Step 6: Final answer
   x = 2,079.65