Finding the Third Proportional to 1,629.28 and 3,430.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.28 : 3,430.69 = 3,430.69 : x
2. Step 2: Convert to fraction form
   1,629.28/3,430.69 = 3,430.69/x
3. Step 3: Cross multiply
   1,629.28x = 3,430.69 × 3,430.69
4. Step 4: Simplify right side
   1,629.28x = 11,769,616.72
5. Step 5: Solve for x
   x = 11,769,616.72/1,629.28
6. Step 6: Final answer
   x = 7,223.81