Finding the Third Proportional to 404.72 and 858.38

Step by Step Solution

1. Step 1: Write the proportion equation
   404.72 : 858.38 = 858.38 : x
2. Step 2: Convert to fraction form
   404.72/858.38 = 858.38/x
3. Step 3: Cross multiply
   404.72x = 858.38 × 858.38
4. Step 4: Simplify right side
   404.72x = 736,807.64
5. Step 5: Solve for x
   x = 736,807.64/404.72
6. Step 6: Final answer
   x = 1,820.54