Finding the Third Proportional to 634.88 and 1,320.56

Step by Step Solution

1. Step 1: Write the proportion equation
   634.88 : 1,320.56 = 1,320.56 : x
2. Step 2: Convert to fraction form
   634.88/1,320.56 = 1,320.56/x
3. Step 3: Cross multiply
   634.88x = 1,320.56 × 1,320.56
4. Step 4: Simplify right side
   634.88x = 1,743,885.32
5. Step 5: Solve for x
   x = 1,743,885.32/634.88
6. Step 6: Final answer
   x = 2,746.82