Finding the Third Proportional to 6,690 and 7,290

Step by Step Solution

1. Step 1: Write the proportion equation
   6,690 : 7,290 = 7,290 : x
2. Step 2: Convert to fraction form
   6,690/7,290 = 7,290/x
3. Step 3: Cross multiply
   6,690x = 7,290 × 7,290
4. Step 4: Simplify right side
   6,690x = 53,144,100
5. Step 5: Solve for x
   x = 53,144,100/6,690
6. Step 6: Final answer
   x = 7,943.81