Finding the Third Proportional to 209.06 and 279.38

Step by Step Solution

1. Step 1: Write the proportion equation
   209.06 : 279.38 = 279.38 : x
2. Step 2: Convert to fraction form
   209.06/279.38 = 279.38/x
3. Step 3: Cross multiply
   209.06x = 279.38 × 279.38
4. Step 4: Simplify right side
   209.06x = 78,050.39
5. Step 5: Solve for x
   x = 78,050.39/209.06
6. Step 6: Final answer
   x = 373.34