Finding the Third Proportional to 190.69 and 279.28

Step by Step Solution

1. Step 1: Write the proportion equation
   190.69 : 279.28 = 279.28 : x
2. Step 2: Convert to fraction form
   190.69/279.28 = 279.28/x
3. Step 3: Cross multiply
   190.69x = 279.28 × 279.28
4. Step 4: Simplify right side
   190.69x = 77,998.02
5. Step 5: Solve for x
   x = 77,998.02/190.69
6. Step 6: Final answer
   x = 409.04