Finding the Third Proportional to 436.78 and 909.56

Step by Step Solution

1. Step 1: Write the proportion equation
   436.78 : 909.56 = 909.56 : x
2. Step 2: Convert to fraction form
   436.78/909.56 = 909.56/x
3. Step 3: Cross multiply
   436.78x = 909.56 × 909.56
4. Step 4: Simplify right side
   436.78x = 827,303.94
5. Step 5: Solve for x
   x = 827,303.94/436.78
6. Step 6: Final answer
   x = 1,894.09