Finding the Third Proportional to 1,320.50 and 3,057.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.50 : 3,057.50 = 3,057.50 : x
2. Step 2: Convert to fraction form
   1,320.50/3,057.50 = 3,057.50/x
3. Step 3: Cross multiply
   1,320.50x = 3,057.50 × 3,057.50
4. Step 4: Simplify right side
   1,320.50x = 9,348,306.25
5. Step 5: Solve for x
   x = 9,348,306.25/1,320.50
6. Step 6: Final answer
   x = 7,079.37