Finding the Third Proportional to 445.78 and 575.86

Step by Step Solution

1. Step 1: Write the proportion equation
   445.78 : 575.86 = 575.86 : x
2. Step 2: Convert to fraction form
   445.78/575.86 = 575.86/x
3. Step 3: Cross multiply
   445.78x = 575.86 × 575.86
4. Step 4: Simplify right side
   445.78x = 331,614.02
5. Step 5: Solve for x
   x = 331,614.02/445.78
6. Step 6: Final answer
   x = 743.89