Finding the Third Proportional to 373.31 and 685.03

Step by Step Solution

1. Step 1: Write the proportion equation
   373.31 : 685.03 = 685.03 : x
2. Step 2: Convert to fraction form
   373.31/685.03 = 685.03/x
3. Step 3: Cross multiply
   373.31x = 685.03 × 685.03
4. Step 4: Simplify right side
   373.31x = 469,267.81
5. Step 5: Solve for x
   x = 469,267.81/373.31
6. Step 6: Final answer
   x = 1,257.04