Finding the Third Proportional to 648.56 and 998.25

Step by Step Solution

1. Step 1: Write the proportion equation
   648.56 : 998.25 = 998.25 : x
2. Step 2: Convert to fraction form
   648.56/998.25 = 998.25/x
3. Step 3: Cross multiply
   648.56x = 998.25 × 998.25
4. Step 4: Simplify right side
   648.56x = 996,503.06
5. Step 5: Solve for x
   x = 996,503.06/648.56
6. Step 6: Final answer
   x = 1,536.48