Finding the Third Proportional to 521.25 and 1,086.75

Step by Step Solution

1. Step 1: Write the proportion equation
   521.25 : 1,086.75 = 1,086.75 : x
2. Step 2: Convert to fraction form
   521.25/1,086.75 = 1,086.75/x
3. Step 3: Cross multiply
   521.25x = 1,086.75 × 1,086.75
4. Step 4: Simplify right side
   521.25x = 1,181,025.56
5. Step 5: Solve for x
   x = 1,181,025.56/521.25
6. Step 6: Final answer
   x = 2,265.76