Finding the Third Proportional to 644.06 and 792.56

Step by Step Solution

1. Step 1: Write the proportion equation
   644.06 : 792.56 = 792.56 : x
2. Step 2: Convert to fraction form
   644.06/792.56 = 792.56/x
3. Step 3: Cross multiply
   644.06x = 792.56 × 792.56
4. Step 4: Simplify right side
   644.06x = 628,155.32
5. Step 5: Solve for x
   x = 628,155.32/644.06
6. Step 6: Final answer
   x = 975.30