Finding the Third Proportional to 429.05 and 620.37

Step by Step Solution

1. Step 1: Write the proportion equation
   429.05 : 620.37 = 620.37 : x
2. Step 2: Convert to fraction form
   429.05/620.37 = 620.37/x
3. Step 3: Cross multiply
   429.05x = 620.37 × 620.37
4. Step 4: Simplify right side
   429.05x = 384,855.45
5. Step 5: Solve for x
   x = 384,855.45/429.05
6. Step 6: Final answer
   x = 897.00