Finding the Third Proportional to 636 and 1,375.50

Step by Step Solution

1. Step 1: Write the proportion equation
   636 : 1,375.50 = 1,375.50 : x
2. Step 2: Convert to fraction form
   636/1,375.50 = 1,375.50/x
3. Step 3: Cross multiply
   636x = 1,375.50 × 1,375.50
4. Step 4: Simplify right side
   636x = 1,892,000.25
5. Step 5: Solve for x
   x = 1,892,000.25/636
6. Step 6: Final answer
   x = 2,974.84