Finding the Third Proportional to 1,720.69 and 2,758.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,720.69 : 2,758.22 = 2,758.22 : x
2. Step 2: Convert to fraction form
   1,720.69/2,758.22 = 2,758.22/x
3. Step 3: Cross multiply
   1,720.69x = 2,758.22 × 2,758.22
4. Step 4: Simplify right side
   1,720.69x = 7,607,770.67
5. Step 5: Solve for x
   x = 7,607,770.67/1,720.69
6. Step 6: Final answer
   x = 4,421.36