Finding the Third Proportional to 655.50 and 755.50

Step by Step Solution

1. Step 1: Write the proportion equation
   655.50 : 755.50 = 755.50 : x
2. Step 2: Convert to fraction form
   655.50/755.50 = 755.50/x
3. Step 3: Cross multiply
   655.50x = 755.50 × 755.50
4. Step 4: Simplify right side
   655.50x = 570,780.25
5. Step 5: Solve for x
   x = 570,780.25/655.50
6. Step 6: Final answer
   x = 870.76