Finding the Third Proportional to 451.69 and 985.78

Step by Step Solution

1. Step 1: Write the proportion equation
   451.69 : 985.78 = 985.78 : x
2. Step 2: Convert to fraction form
   451.69/985.78 = 985.78/x
3. Step 3: Cross multiply
   451.69x = 985.78 × 985.78
4. Step 4: Simplify right side
   451.69x = 971,764.67
5. Step 5: Solve for x
   x = 971,764.67/451.69
6. Step 6: Final answer
   x = 2,151.41