Finding the Third Proportional to 108 and 263.25

Step by Step Solution

1. Step 1: Write the proportion equation
   108 : 263.25 = 263.25 : x
2. Step 2: Convert to fraction form
   108/263.25 = 263.25/x
3. Step 3: Cross multiply
   108x = 263.25 × 263.25
4. Step 4: Simplify right side
   108x = 69,300.56
5. Step 5: Solve for x
   x = 69,300.56/108
6. Step 6: Final answer
   x = 641.67