Finding the Third Proportional to 672.89 and 978.33

Step by Step Solution

1. Step 1: Write the proportion equation
   672.89 : 978.33 = 978.33 : x
2. Step 2: Convert to fraction form
   672.89/978.33 = 978.33/x
3. Step 3: Cross multiply
   672.89x = 978.33 × 978.33
4. Step 4: Simplify right side
   672.89x = 957,125.92
5. Step 5: Solve for x
   x = 957,125.92/672.89
6. Step 6: Final answer
   x = 1,422.41