Finding the Third Proportional to 451.13 and 683.72

Step by Step Solution

1. Step 1: Write the proportion equation
   451.13 : 683.72 = 683.72 : x
2. Step 2: Convert to fraction form
   451.13/683.72 = 683.72/x
3. Step 3: Cross multiply
   451.13x = 683.72 × 683.72
4. Step 4: Simplify right side
   451.13x = 467,471.33
5. Step 5: Solve for x
   x = 467,471.33/451.13
6. Step 6: Final answer
   x = 1,036.23