Finding the Third Proportional to 357.56 and 620.06

Step by Step Solution

1. Step 1: Write the proportion equation
   357.56 : 620.06 = 620.06 : x
2. Step 2: Convert to fraction form
   357.56/620.06 = 620.06/x
3. Step 3: Cross multiply
   357.56x = 620.06 × 620.06
4. Step 4: Simplify right side
   357.56x = 384,477.50
5. Step 5: Solve for x
   x = 384,477.50/357.56
6. Step 6: Final answer
   x = 1,075.27