Finding the Third Proportional to 436.83 and 649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   436.83 : 649.31 = 649.31 : x
2. Step 2: Convert to fraction form
   436.83/649.31 = 649.31/x
3. Step 3: Cross multiply
   436.83x = 649.31 × 649.31
4. Step 4: Simplify right side
   436.83x = 421,606.72
5. Step 5: Solve for x
   x = 421,606.72/436.83
6. Step 6: Final answer
   x = 965.15