Finding the Third Proportional to 78.50 and 205.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78.50 : 205.25 = 205.25 : x
2. Step 2: Convert to fraction form
   78.50/205.25 = 205.25/x
3. Step 3: Cross multiply
   78.50x = 205.25 × 205.25
4. Step 4: Simplify right side
   78.50x = 42,127.56
5. Step 5: Solve for x
   x = 42,127.56/78.50
6. Step 6: Final answer
   x = 536.66